You need to choose something anything and not worry about all the other things you could be doing . Like guitar for example I learnt on youtube ( justin guitar is amazing!) I make sure I practice everyday just a bit bit or I don’t keep it up. Sometimes I have break days. I think the biggest thing for me is choosing something I really want to do and acknowledging that it is not always going to be easy to keep it up sometimes I have to push myself when I’m tired etc but I focus on how happy I will be in the future when I play this song I’m working on. Learning to accept frustration and believe in myself to perservere has been the biggest thing for me.