Just Hired

Hi everyone. I just got hired like a few minutes ago haha, but I just have to wait to do my background check and then I can start. But what should I know before starting? Any tips or tricks. Also what should I wear? I know that it’s like black clothing I did some research but does it have to be Starbucks brand? Also what are the best shoes? Thanks! Also thanks to whoever posted the star interview questions I was really think it helped me nail my interview!