This is my OC she has no name yet but she likes to smile

This was originally a watercolor pic but i fail D=
*The picture is soooooo bad, i can't to let human eyes see it*
So its now like this coz i felt bad about ruining it coz i kinda liked the sketch

Anyway patterns are from kidchan in DA

Question: How can i color the skin?

Question: How do i make a brush in photoshop?