Well, a few tips come to mind. Try to hide the curves that you don’t need. Make sure that you don’t create duplicates with inherit properties. Work with solid numbers: i.e. if you want to move an object (or a key) a few points up, don’t do box select, just select that object, press G / Z / Num 3.
And don’t rush. Having some troubles is totally fine. Take your time to understand the process, maybe repeat some lessons or rewatch some tuts and try to do something offline, by yourself, not after the teacher. That helps a lot too.
