Corporate registers are the easiest thing to learn imo. We have a touch screen where every single thing is literally spelled out for you, there’s different tabs for drinks and it’s own button for basically any and every customization. Just gotta click around at find it until it becomes muscle memory. At the licensed store I worked at we had to use PLUs so we had a little binder by the reg that we flipped thru and had to type the number code in. Was very annoying, we didn’t have a way to input everything so we relied on cup marking for making the drink right, we almost never had an accurate price for drinks customers ended up getting them cheaper than from corporate stores just because no one ever helped us with the register. Also can’t do everything with the Starbucks card that corporate stores can do, so that upsets customers too. I would go directly to someone higher up than the person NOT training you and let them know. Also just explain to customers you’re a licensed store and not corporate so things are done a little differently but the drinks SHOULD turn out the same. Every time a customer complains make note of it and use it as another reason why you need better and more training

i work at a licensed store as well and was given a quick rundown on the register and then was thrown on it during a rush. it sucks, but like everyone else says, you'll get used to it eventually