Another suggestion would be to look at magazines or pics of quilts on-line. What "jumps out" to you. Are you or your dtr drawn to certain quilts because of the colors? This is also the most difficult part of quilting for me but I find the more quilts and color combos I look at, the easier it is to pick fabrics. Also, some patterns call for certain combos: scrappy, floral, batik, etc. My favorite colors change but all my quilts have black in them (does that mean I'm a dark dreary person LOL?).
Good luck-remember, the more you do something the easier it will become. Practice putting colors together and I'm sure she'll love whatever you do