Honestly the best tip is just to practice and get that bar experience (at least for me). It seems you are lucky that they are putting you on bar because most green beans get delegated to Warming/CS for their first weeks off of training.

My biggest thing is to learn how to make the drinks properly first because that’ll be your biggest hurdle, sequencing can come later.

i'm jealous lol i'm the newest at my store and don't get bar unless my angel of an SM makes the ssv to so I can get practice

make a cheat sheet with the important stuff (shots, pumps, standard builds etc) and tape it on the bar when you’re deployed there. also ask your partners questions!! like ask so many questions until you start answering them correctly in your head. when i started i’d go home and make notes on how to build popular drinks (ex: caramel macchiato, iced white mocha.) btw you will get better, it’s all in due time.