 3.3.19  11:54 pm any of the things you play, really, though i am curious especially about the ones we see in videos. 1. singing and playing keyboard (i have to work v hard on this because two hands are doing two different things but then once i have the muscle memory i can put the vocals on top of it more easily)
usually if i'm playing and singing i'm not playing an exactly memorized keyboard part. also if you are playing by yourself, then your left hand will probably only be playing 1 note at a time (bass). but what i would suggest is just start out with a much much simpler part. once you reach the magic threshhold of simple enough to do, you will watch yourself magically and randomly start to sprout new techniques out of nowhere