I am glad you got started. Don't worry about the small mistakes. I still cut pieces the wrong size or crooked and still don't always have a 1/4 inch seam. I think your colors are beautiful. I know there are several designs you can make out of a D9P, so I may be wrong, but I don't think you have your four pieces lined up quite right. I am not experienced enough to know how to tell you what to do though.
I am going to include a picture of a D9P quilt I made with 3 fabrics. Maybe it will explain what I can't. I sure love your fabric!! ....okay, I couldn't find the picture I was looking for, but here are three examples I have made. I guess I used the same layout for all 3, two are small quilts I made for my cat and the other is a close up of a larger quilt I made. (I can't find a picture of the whole quilt.)
Dina