If you want to do creative work, start now. Not tomorrow, not next week, definitely not when you retire, but now. If you want to be a writer, start writing. If you want to paint, pick up a brush. Nothing is standing in your way on this, unless you can't afford the tools and materials for your creative work.
Your first excuse is likely to be that you don't have the time. We lead busy lives these days, but surely you could take fifteen minutes away from Facebook to sketch a bowl of fruit or something.
The next excuse is going to be that your work is not very good. Well, while you're learning, you have my personal permission to suck, because I know that means a lot to you. Just keep going. You're going to get better at it just by doing it over and over, but you'll get better quicker if you look at what you're doing, decide what isn't working, and try some new ways to make it better.
Mokalus of Borg
PS - I don't actually feel qualified to be offering much advice on this, yet.
PPS - However, the world will be a better place with more art, and some of it should come from you.