Why not?

Put some stuff together and sell it on Ebay - or take it to a craftshow and see how stuff sells. Clearly, you're not going to go to Macy's (at least not right away) but start out small and see how people respond to your work :-)

If you're good at it you're good at it - formal training or not. Oh, but you may check that ego just a bit, especially for someone with no experience :D

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