Adobe Photo color

I have a drawing that needs be colored and made into a pdf . It is a tree on “fire”. It can be done in a realistic or simplistic way. Should be a fairly easy job and shouldn’t take someone more than an hour. The picture that is colored is my attempt on paper and I need to colors to be slightly more solid . But if the blank image can be used in a way to make the drawing more realistic that would be an option as well.