Advice for Dealing with Concert Anxiety

does anyone have any sort of advice for going to a concert, I'm afraid I'm gonna get overwhelmed and want to leave, but I don't want to disappoint my friends if I do get overwhelmed... also scared due to being in essentially a big pool of people I don't know. I hate crowds due to the idea of people wanting to harm me.. hopefully due to being with most of my close irl friends (about 3 people) I do plan on trying to find shades I can bring Incase of bright lights on stage I want to try and get ear plugs but.. I'll consider it as a last minute thing.. I'll keep thinking on it