Don't wear your apron in lol. A hat shouldn't be an issue tho! I would also mention that you're there for training before clocking in and I'm sure they'll direct you and show you around.

Fellow anxious green bean here :)

You might not be able to clock in right away. I wasn’t able to clock in for a few days. (You’ll write your punch times down so you still get paid). Definitely introduce yourself and let them know it’s your first day of training. They’ll pair you with your barista trainer.

Don’t wear your apron through the door, but bring it with you. The first day is a lot of computer training which reaaaallyy helped me calm down a bit. Less pressure :)

I did modules on iPad for about 4 hours then trained on hot and cold bar for about an hour and a half. (I did need my apron for the last part).