"I don't know how to draw" -many of my friends, simultaneously dismissing drawing as out of reach and as a challenging hobby in which they fear they could not be good at - at least in the crucial initial stages (the fear of peer judgement) If you want to learn how to draw, you can learn how to draw. You start out drawing lines and blocks, move on to cylinders, than to pots and pans, shoes, chairs, simple still-lifes…
I've never been great at drawing (freehand, I can do mechanical stuff okay), but I realize it's mostly because I don't put the time into it that I could and so I'm much slower at it than someone who is an expert and does it all the time (so that eventually leads to frustration). I do try to use that as a reference point for explaining to people that think they cannot learn how to program though (or learn to be better…
I have devoted a lot of my time to making art, and I can tell you that frustration is a fact of life for me. I'm virtually never as good as I want to be. My work rarely turns out the way I want; and this doesn't even begin to touch on issues of coming up with ideas and creativity/originality. Learning to deal with and live with failure is just something many ordinary artists have to do constantly.
"Fail early and often" is as much of a maxim to live by for artists as it is for entrepreneurs.
Perhaps 1 in 100, or 1 in 1000 works will be something you're pleased with, and then you can count that as a success. Or perhaps the journey can be counted as much or more of a success than the destination. A lot depends on your expectations.
William Staford was once asked how he was able to write a poem every day. He answered, "I lower my standards."