Other then approach anxiety I have some other fears when I think about approaching (for reference, I'm a college sophomore whos a virgin, never had a relationship before, pretty introvert, never approached)
1) Thinking too much- I overthink everything in general, but when I see a girl I'm attractive to I always think about how the conversation would flow, what I would say, what she would say etc. For example i see this one girl in one of my classes in the library sometimes, and I always think i should approach and say "hey arent you in this class, my name is...whats your name?" but then I wouldn't be able to think about what to say next to carry the convo.
Also along the lines of thinking too much I kind of freak myself out thinking if I do approach she going to tell all her friends that some guy approach her and just thinking about that makes me feel weird

2) Thinking too much about the sex- In my head(this goes with overthinking) I skip to how it would be having sex with a girl I end up attracted to, which probably adds to the approach anxiety. Also being in college where the sexual tension is high(to me anyway) adds to this.

3) Being judged by others- Now i know I shouldn't care what others think about me and for the most part I don't (wont show it anyway) but that fear of possibly messing up and being judge could get to me, especially since if I mess up my first approach my confidence could take a hit since it taken this long to even attempt to do it.

Any tips/suggestions could be helpful