You have a really good sense for color theory, literally none of these colors clash 🔥🔥 I'd say it'd be cool to see you draw more dynamic poses because it's kind of easy to get stuck in the loop of drawing characters just standing there... Kinda stunted my growth for awhile

For character sheets, something you could try is drawing the front and back of a character, just so it's easier for them to be drawn at other angles. also, adding more variance to backgrounds helps, even if its just some smudgy details, it can help characters have a better feeling of belonging in a piece. I also see people use angled borders, and it adds more energy to a character. Also, try to experiment with perspective/ line of action. It helps make a super dynamic character, and depending on how you do it, it can help show the personality of your character. Other than that, I think you're good! I love your color palettes, and your line work is nice.

These other guys have nerd language so I'm just gonna say it's cool and I can see that you improved overtime 🤑🤑🤑