I am about to be blunt so prepare yourself
99% of the time the only thing people actually care about is
A: themselves and what they are doing
and
B: other people think about them
As for socially fitting in. How do you know that you aren't socially fitting in ? who told you ?
you want to be a nurse and if you are passionate about it, you will become a nurse. You just will.
There are so many different ways. You could do an apprenticeship: you literally get paid to learn about the thing you love whilst on the job while your peers are stressing about exams and worrying about the debts they stacked up at students.
If you are passionate about the care side of things you could become a HCA and work your way up. The lower down the "food chain" you are , the more patient contact you get. You can spend more time getting to know patients and trying to help them out and less time stressing out about attending the the 3 feeding pumps and 5 syringe drives beeping at you.
You don't NEED to tell your parents/ friends. You can tell them in your own time. I promise the thing they will probably be thinking is "I hope you aren't upset " not "you are dumb"
Once you find your place; this may be in a hospital as an HCA or as an ambulance technician or even a domestic assistant, and when you find your people , you will fit right in.
I'm autistic, I've never had any friends and never felt like I fit in because let's face it. I don't.
But I am passionate about care. After a few weeks on the job I felt like I fit in and that we were one big family. You might not feel this right away but it doesn't mean it won't happen. You just need to get into the swing of things.
Also , let me remind you that you are 19, not 40 meaning that you still have 20 years to do whatever you like. My aunt decided to go to uni at 40 and train to become a nurse because she wasn't satisfied with her job. She now is a great nurse and feels fulfilled in her job. Whatever you decide to do isn't set in stone and you aren't condemned. If you chose to work your way up from HCA to RN, you will still become an RN and you will have more experience and Bette people skills than people straight out of uni.
what ever you chose, you are great, if you say you're not you know that you are lying and trying to make your life more difficult so tell yourself that now isn't the time, have a cuppa and a jaffacake and sleep it off.
GOOD LUCK!!!!