The Key to playing any instrument is actually living and loving music.
Not just saying so, not just buying so, but actually working and playing so much that you have no social life.
Family members passing on and you play the next day without fail.
No chicks. No friends. No nothing.
Sacrifice even when it's not even guaranteed.
The songwriting, dunno. You will have to decide if it's good enough for you. Because it's good enough for me.