What are some good conversation starters?

The possibilities to start conversations are huge. Here are some of them:

"Good morning, it is a nice/bad weather isn't it?"
"Hi, could it be that you are in the same xx-lesson like me?"
"Hi, I have seen your shirt, it seems that you are a great fan of xx too."
"It seems that you need some help, may I help you?"
"You are in the xx party, right? may I join?"
"Are at the xx university?"
"It seems that we are studying the same. Is it so interesting for you too?"
"I am new in this city, can you tell me where the xx is?"
"Are you new in this city/university? I have never seen you before."
"I like your (any garment). You are cutting a fine figure in it."
...

All those are good, except the last two (especially don't use the last one, that will just cause a mis-understanding).

One said that they can't cook so I left them.

The other three were females of African/Caribbean descent which is a lot easier due to my lack of attraction to them.

One could cook, one couldn't cook or bake, and one could do both.
I think I got the third one to have a tea party.
I also conversed with them about endocrinology a bit.

If you find trying to talk to absolute strangers startling, try joining a club that interests you and then try making some friends there. It will be much less of a daunting task!

I've come to realise that if I don't talk to people I'll be alone forever...

I don't really talk to other people because I get scared. I worry what they will think of me but once I talk to someone I get relaxed can be myself.

Females are worse because they're females. I have a lot of things that go up my head when I try to converse with one. I worry they may think I am only conversing with them because I am looking for sex or that I'm trying to "chat them up" which I don't do and I don't want sex. but they don't know that...

No one ever approaches me which I don't understand.

I've decided that I need to talk to other people as they won't talk to me.

I went up to 4 people yesterday and went "Hello, what do you like to cook and/or bake?" as I like to cook and bake and it's a way to start a conversation.


What are some other conversation starters I could use?

But to find common interests out, you have to talk first, have not you? without knowing common interests, it is difficult to find a club with those interests to join, am I right?

Don't try and find a 'common' interest. Find something you like and join a club or society which revolves around your interest. Don't join a club just because everyone does so!