I could have approached where to start in a few different ways but in the end, I just started wherever I felt like. My next step will probably be basing in more of the petals that surround the ones that I've done.
After I've filled in some more, I will go back and darken and brighten. The colors of the petals as they are now, are just the start. A lot still has to be done to achieve the colors that I want. You never just put down one wash of color and call it quits....many more colors are added afterward to give the flower real depth. I think a nice orange/red will do the trick.
This photo shows how the picture looked after it was cropped. This kind of close-up and this particular view, is what I wanted to actually create my painting from.