These prices sound perfectly fair to me!
Your art is so lovely <3 Very stylistic and great use of color!
Some artists also like to indicate their prices for headshots, waist-ups, and fullbody for each type of commission.
So for example:
Headshot - 7m
Waist-up - 12m
Flatcolor/ Cell shade:
Headshot - 25m
Waist-up - 30m
Fullbody - 35m
I'm just suggesting random numbers there :)