I'm scared to go to the gym

I (f21) am currently on my winter break from college. I don't what to do during break. My friend said that we should go to the gym together when we start.

I sent her a message but she gives me excuses of being so busy with work. We're already two weeks into winter break and still nothing so I just thought "fuck it I'll just go on my own" instead of just waiting for her.

But there's this anxiety I have of being judged (I'm overweight) or looked at cause I've never workout at the gym before and I'll just embarrass myself and I literally don't know how to use the equipment.