The most effective way to do it, is to do it.
I can, therefore I am.
It's always too early to quit.
If you're going through hell, keep going.
Expect problems and eat them for breakfast.
Do not weep do not wax indignant. Understand.
Go for it now. The future is promised to no one.
You never know what motivates you.
Problems are not stop signs, they are guidelines.
Things do not happen. Things are made to happen.
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.