Hello, I'm looking for advice on how to stop being a virgin at seventeen. I want to have my first sexual experience with a girl who's fifteen or older, no matter what.

As I can see you are pretty schizo, so this is my advice:
>learn how to be more normie
>meet normie people
>flirt with the girl you like the most
>go out with her
>hold hands, kiss, you know
>in some months you already should have get it laid
>dump her if you want

Now, if you want real advice, then listen: DON'T BE SO FUCKING DESPERATE FOR SOMETHING LIKE SEX. You can unironically do what I said up there and it could work, but I assure you that you'll feel like shit after that, and you will probably bear with guilt for the next few years
So, just work on yourself, study, get a job, meet good people, and you will get a good woman for you. Of course, you have to be selective, but at that point you should be smart enough
Anyway, it's on your hands, OP