I find that developing a system of working your way up to Approach hot girls is key...

I found just talking to people in class and getting comfortable in an easier situation works well at first...

But you have to put in the effort...

But always go with the flow when possible... When I first started learning, I tried too hard and came off as desparate.

But going with the flow means take in non-verbal signals when approaching...but part of being cool is not showing that you care too much at first...

That way you will feel more comfortable when you approach...

Then eventually you will feel the balls, to do it more.