I bring my 11 yo daughter with me. She has a far better eye for color than I do and can tell me if the colors work together or not. I also found I do better if I limit myself to 3 or 4 colors in a quilt. The baby quilt I'm making right now is shades of white, pink and lavender. I found out the hard way on it that I couldn't do a lot of different colors and spent some quality time with a seam ripper sorting it out. I can't do scrappy either, I have a lot of respect for those who can. Don't worry too much about prints except maybe to stay with small patterns to start. You're cutting the fabric into little pieces anyway. I love blender type fabrics, they give a little variety while staying in the same color range. It can also be helpful to check out books on quilts at your local library and go thru the magazines there too for ideas of what works for you.
Give yourself some time. You'll get to where you're more comfortable with picking fabrics soon enough.
Rodney