How important is drawing ability for painting? I remember some artist saying that "Painting is 90% drawing", but I'm ok with drawing and have a lot of difficulty with painting, especially oils.
You'll only be able to paint as well as you can draw. However, an encouraging spin on it is that painting is simply drawing with color.
The rules of value, form and hue still apply.
Try a 2 color painting with a warm and cool hue, identifying form and shadow and getting a feel for the medium.