Buy a cave, live there for the rest of your life. Allow no one to see your art– ever.
In your will, leave directions to where your art is hidden, so that someone somewhere can show and sell it once you’ve transitioned to the great beyond.
But seriously, if your goal is to show your art publicly, then you have to take the risk of presenting it online. These days, that’s the number one way to spread the word about what you’re doing… and there’s no close second. If you do not want to show your art publicly, then connect with like minded people on this forum…for the love of ART!