Need help don’t know what to do!

I’m a 17-year-old male, and there’s a girl at my school whom I really like, but I don’t know anything about her. I’ve tried to gather the courage to talk to her for a year, but the furthest I’ve gotten was eye contact from a distance. I’ve also never been in a relationship, have very low self-esteem, and have severe social anxiety. someone please help!!!