It CAN be done, but will require sacrifice, hard work, and enormous perserverance. Early on you MUST decide whether you want income or artistic gratification. The possibility of having both is rarer than diamonds. There are several articles on my website relating to the business end of stained glass that you might find helpful. I'd wish you luck, but luck has nothing to do with it.
Success comes from hard work.
So, I hope you're willing to do that. Start with several classes. You'll learn fastest that way. If you make a concentrated effort, you should be able to start selling a few pieces at local craft fairs in less than a year. It does NOT absorb thru the skin - only by ingesting.