Welcome!
Nothing wrong with a drink or two to loosen up. Just stop short of getting tipsy!
My advice would be to check out YouTube for pickup artists... find a style that matches your own (or one you think you can emulate)... Then start out with a newbie mission!
the-newbie-mission-vt41556.html
Sounds like you just need to break through your AA (Approach anxiety) and get more comfortable talking to and socializing with girls... That should be priority number 1 for you.
Use the forum and its members if you have questions. Lots of experienced guys here.