First shift: help

Hi, I have my first shift soon and was just wondering how will they pay me since they do not have my bank info and they have not asked for it?

Do I need to tell them my bank info during the shift? I’m a bit confused. Also will I be payed on the first shift and what should I wear because I don’t have my uniform yet. I don’t have formal clothes but I have some long black pants and could I just wear a regular t shirt, I don’t have plain ones. It has some words and stuff on the back and front.

Thanks :)