22M, I’m going to my first frat party tonight? What do I do?

I’m 22 and a little socially awkward. I’m a sophomore in college so I’m already nervous since I’m not as young as everyone else but I still haven’t conquered my fear of girls/social interaction. This all started because I decided to go to the black cultural center at my university today and found out they had a delta party tonight by talking to the president of the Alphas. I want to talk to girls and people and I also maybe want to join a frat. I’ve been at parties and bars/clubs before but those were with my old friends. I will be going alone this time. What do I do and how do I have fun and not embarrass myself?