I suck at art, or at least I think I do. But seeing your potential is key. And building towards that is that goal. Your view of your potential will keep changing and you'll probably get frustrated by that, but the importance is to keep making. I still doubt my abilities and my work daily, but make it even if its bad. I'll take a break for a few hours, go about my day, and then hit a shitty pencil piece with ink or markers or colors to see another way of making something that I like. The next time, try the original technique again until you make something you like. Just. Keep. Going.