Q: When i play piano both of my hands want to do the same thing. How do i fix this?
A: first figure out what you want them to do. there are some key questions to ask first: are you playing by yourself? who has the melody? (your voice, your hand, someone else's voice or hand, etc). Who is playing bass? (your left hand, someone else,)... Who is playing the chords? (you, someone else)... The answer to these questions will determine what each of your hands should be doing. and then there are different strategies depending on how many jobs you have to do. In some cases, maybe your hands only have 1 job, in which case it's not a bad idea to put 1 hand behind your back