I think your art is pretty good but if I could give one piece of advice is maybe work of shading and shadows to give your characters more 3 dimensions

Yes, that would help to understand volume, thanks

one advice i would say would be to gather all of your favorite pieces of arts by other artists, and use them as a reference, to see if there's anything u do want to improve on or add into your own arts, by wanting to add elements/ideas of your favorite works onto your own projects, from lineweights to shadows, backgrounds, all that stuff! c:

Quite interesting, I appreciate it, I will take it into account