Don't let it be frustrating, just keep telling yourself that we all do it at the beginning. There's so much to learn and what started to work for me is that I'd start a piece and really focus on just one element that I wanted to try to master. If it was keeping the air on all the time, that would be my main focus and thats what I wanted to learn from the piece. If I screwed up lines because of one thing or another, that would then be the focus of the next time. Taking it one step at a time worked for me.Yep I have been, this is whats frustrating.