Im very worried/scared and need some advice.

Hello, im a young Catholic (17) and im making my first confession in about a week. I thought I had come to terms with it, but today I almost had a panic attack thinking about it. It has nothing to do with actually saying my sins or anything, im okay with that, im prepared, I know what to say, but im scared because of how my first confession is being set up by my religious director that the priest will get mad at me, ill take up too much time, or something along those lines, also theres a good chance it will be face to face which I am really also worrying about, like how can I look at him and say what ive done or even comfortably read from my list. Basically the way my first confession is being set up is ill just make it during a community penace service (held for the current season) but im scared ill be holding up the lines or the priest will be angry for me taking a long time, or he won't be warned before hand that some kids are making. Their first confessions, worst part is i have no irl practicing Catholics to confide in, so im stuff here. Literally anything helps, God bless.