How do I make friends?

Find all the miserable people who are in exactly the same mind set and chat with them. It is incredible how many people just hate going out, and how many people feel forced to be sociable. I presume your Mum and Dad are suggesting you go to church just for the 'getting out' and the social acceptance of newcomers?
You should not be worried at all for being a self confessed 'Tom Boy' you can be anyone you want to be. You are as you are, and be happy with your positive's It's ok to be a tom-boy and dress in pink, or do mechanics. You have to be comfortable as you are, and be confident that one day you will find your niche. You can be whoever you want to be, and find so many like minded people where ever you are, it can just take a little time, so don't lose hope.
Do a search online of local organisations who will help young people meet up and make contact. It is always helpful to share an interest. Look at those organisations looking for volunteers, and during the course of that work you can get to meet anyone and everyone. Have a go at outdoor activities, scouts, guides, college groups and try mountain walking, or any of the outdoor groups that love wild camping, survival skills or white water canoeing? Look at all the sports or activities under the sun and see which one might be of interest. Look at fitness activities or local community help volunteer groups that help do things like shopping or companion visiting. The thing is never to stop trying. Don't try too hard, or force the day or the decision. Just keep gently trying and keep putting yourself out there. All of a sudden you might just meet someone with whom you share lots of mad ideas and get on with fabulously.
Work to your strengths, and don't be afraid to use the phrase 'tom boy' as a reason to feel out of the main group. Why have a label? Just know what you love and make a point of doing it. You need to get a passion in life for everything you would ever want to do. Try rebuilding an engine, or go racing cars, bikes. Absolutely good fun. Look at yachting sites that need crew for a trip abroad. Its all there and you have a lifetime to go at anything and everything.
So the start is just to let yourself dream and drift into what you see yourself doing and then to make a plan for research. Don't discount anything but look at the practicalities secondary. Make lists and plans, and try to diary something ion once a week at first, then give yourself a positive to look forward to every day. I would sound off some of the help lines and ask how can I find new friends or contacts and take it from there. Good luck out there. Lots of good people out there, its a bit like a treasure hunt to find them!
NSPCC have 'Building Connections' on their web site to help young people tackle loneliness
Youth Access for free support for teens to adulthood
Teenage Helpline
The Mix - Essential support for under 25's
NCVO for finding volunteering opportunities

Pressure is exactly the opposite of what you need from your parents. You have to be the best version of you that you can be, and try to relax, and talk to people openly without being shy or fearful if you can. Fear will hold you back because your mind will tell you not to do something that you totally should do in order to make progress. If you can break the mental barriers you will be proud of yourself and people will be proud of you. Don't let your mind be your enemy, make it your best friend and reliable ally.

Good friends don’t come when you chase, if you chase friends they only sense your desperation and run, or you attract the wrong kind of person.
Attract good friends by doing all the internal work, I promise you that they’ll flock to you. By this I mean really get to know yourself, because at the end of the day you are the one person that you’re stuck with your entire life, being your own best friend sets an expectation for how others should treat you – it’s attractive and most people aim to love themselves more so will love this energy – and also instills a trust in yourself that you can exist socially. I would also recommend getting used to the idea of being super uncomfortable at first when you start changing how you act in social situations, growth isn’t meant to be easy, that’s why there are so many imperfect people in the world, and embrace all the embarrassing **** you accidentally say and do because that’s just part of the process (you could be the most charming, socially adept person in the world and still create awkward scenarios now and again, it’s normal, it’s human, it’s something everybody does, and it can be hilarious when you eventually learn how to joke about these mistakes with people)
Obviously it’s all easier said than done, these are super vague things, but I believe in you stranger on the internet!! If you’re struggling with how to start doing the internal stuff, here are some prompts to get more comfortable with yourself and attract loving people:
- I love myself for…
- I forgive myself for…
- I will dedicate my day to my happiness and fulfilment by…
And when it comes to places to meet people:
- a part time job
- the street (compliment strangers, it might not make you friends instantly but it’s a lovely exercise and can really brighten somebodies day, it also gets you more comfortable approaching people in general)
- the internet (again, this is one that now many people agree with, but the internet is a great place to learn how to connect with people!!)
- school (speaking from experience, this one can be rough because ew school, but if there are any sports clubs you’d be interested in joining but are too scared to, just do it. You live once. Just join the club, if you suck at it you’re just giving somebody else reason to teach you, thus making a friend.)
- family (again, depends on the family itself, sometimes this simply isn’t possible – but your family can be such a great source of friendship, appreciate them and all they do for you, these people have known you your entire life and likely will be there for the rest of theirs)
And top tip from me: keep interactions light and positive, no matter how miserable you are as a baseline, because conversation is just an energy transaction (don’t rob people’s positive energy and leave them nothing, it’s mean and theft)
I’m wishing you the best of luck, this is me spewing out everything that has helped me (I used to be severely socially awkward and depressed, now I’m much happier) so take it with a grain of salt, but don’t fault it till you try it
Good luck!!

I have made friends before but my parents never liked them because they weren't Christian, so anytime I made friends my parents would ask me so many questions about my friends. Everytime I feel like I'm under investigation and it makes me have a panic attack. My parents believe that I should only have Christian friends according to them any other type of friends I have are a bad influence on me even though the friends aren't.

With all due respect to your parents that's a terrible environment to be in where your parents question your friends. You should be liberated from that kind of thing, otherwise making friends will be extremely difficult. Seems like your parents are controlling and force-feeding you their beliefs and micro-managing your life. Sounds like this might be why you're lacking in confidence and being down on yourself.