Let us say you had a million doors to open, to find someone you loved, wouldn’t you stop only after you found them. Well that’s how failures work. Failures are what sometime feels like a million doors you have to open to find success. Progression is at least attainable while perfection can never be reached. We must never strive for it because there is always something you could have and will do better in the future. So you can only do the best you can, take notes on what you want to improve, plan the practices that will achieve those goals and stick to them religiously.
This is a video demonstrating a small progression in drawing skill with some more notes to work on for next time.