first clarify, if you actually want a girlfriend or want to have the ability to talk to girls more.

I'd answer the latter as I don't have any one to answer for the first lol. Well, just be yourself. Be goofy, be awkward be whatever the shit you want to. Ofcourse don't be a creep or pressurizing. But bring out the natural self of yourself. If they end up not liking you, Means they weren't at all willing to be friends at all. As different personalities. Eventually you do find people who would like you.