Since you haven't played, it's not cool to go fast anymore, so play slow riffs on ill tuned guitars, paint yourself black (or wear a leather mask) buy a 7 strings, and then, write songs that sell lots of records....
Whatever you start from, enjoy the trip. Pick a song you like, try and play it, share it with the world.
Write a song, to tell your girlfriend how nice she looks, or how the world is a nice place, or only to cry your anger...
Music makes the world a better place, it's what god has given us to talk to other people's heart without words...
Enjoy...