The paint chips idea is a very good idea. I have used that when stuck or to try to come up with a color scheme completely out of my comfort zone. Also using a favorite picture or painting and using colors from it. I also just pull fabrics and play with them. Sometimes I just search Pinterest for, say, “ blue and cream quilts’ to get an idea of what it looks like. A quilter who owned a fabric store once told me that gray goes with everything and that she often used it as a neutral to pull other colors together. Whatever you do, have fun with it! Best wishes on this endeavor. It truly can take time.