i want to give a flat shading to it so it can having depth, but i don't want to over doing it. i worry if this will get dirty shade. Also if there any thing i can improve it like the proportion or the overall shape, i hope you can give me tips for it. Thank you

i want to give a flat shading to it so it can having depth, but i don't want to over doing it. i worry if this will get dirty shade. Also if there any thing i can improve it like the proportion or the overall shape, i hope you can give me tips for it. Thank you | Artwod Feedback