Oh yeah it will definitely get better in time! When I first started, everything was literally like learning a different language to me when it came to the drink sequencing and remembering the recipes and I literally thought to myself that I would never ever memorize or be good at any of it. Now I'm the second or third fastest person on bar at my store. It will literally become muscle memory as you go on🙂 do not even worry about people waiting because it's life and they have to wait for things. Just keep doing your best and don't overwhelm Yourself by thinking about what the customers are thinking about. You're not a robot, you're just a human and you're just starting out so you will definitely get better. A thought that I like is "i dont care what people think about me. What people think about me is none of my business" and it kind of helped me get through the part where I what's always afraid of customers getting angry at me and thinking I'm too slow or horrible at my job when I first started.