You can always spend more time to improve, however sometimes it can be beneficial to move on to a new subject, you might learn new things in other courses/videos which might make you see and realize things that you would not be able to if you spent too much time on the same thing.

I think feedback is pretty important and depending on your level of ability to “self-critique” you may need to seek more or less feedback. personally I always go back and look at work I’ve done a few days later (or the next day) and see where I could have improved it. I think giving the work a bit of time helps reflect on it. id also say improvement in art can be an almost imperceptibly slow process. I also suggest looking back at work you’ve done 6 months or a year ago, since that can help build confidence that you are, in fact, grow as an artist even if day to day it isn’t noticeable.

Hey there! Like Elizabeth said, getting feedback is paramount when you don't know where you're going wrong. This place is okay at helping beginners, but you can always ask anyone around you, too. Even people who aren't artists — family, friends, etc. It might surprise you how good people's eyes are, even if they claim they aren't "artistic." They just might not be able to articulate what it is they're seeing that's wrong. But something is better than nothing. If you can see the problem, but just can't execute it solution, then it's more a matter of pencil milage at that point. Your hand will catch up to your eye, eventually. So, I think the answer to your dilemmas is yes to everything you're wondering. Don't worry so much! You got this. I took a peek at your page, and you're on the right track. With time and practice, you will get better. It's inevitable. It can be frustrating to get hung up on something, I know, but with patience and effort you can bust through, especially if you love it. I find sometimes it helps to actually take a break from practicing what's giving you problems and move on to something else for a bit, then come back and try again when you've had time to ruminate, as it were. When you come back after learning other things, your brain is awesome at solving problems for you in the background subconsciously. You might surprise yourself! One day, it'll click, and you won't even know why it gave you trouble to begin with because now it's so easy! One step at a time is how you walk a thousand miles. Hope this helps!

I think it would help to seek out feedback if you know you're having trouble, but don't know exactly where you're making mistakes. People don't seem to comment on my work here so far, which is frustrating.