What you do today can improve all your tomorrows.
If you're going through hell, keep going.
To know oneself, one should assert oneself.
The most effective way to do it, is to do it.
Leap, and the net will appear.
If you can dream it, you can do it.
After a storm comes a calm.
If you've got a talent, protect it.
Be kind whenever possible. It is always possible.
Go for it now. The future is promised to no one.
There's obviously nothing wrong with selling your art - only an idiot with a trust fund would tell you otherwise. But it's confusing to know how far you should take it.