I believe good fabric brings good results, less dye bleed issues. That said, use cheaper material for sampler blocks as you learn techniques and master 1/4" seams, then move onto quality fabrics. IMO sewing on colors and fabrics I like is much more enjoyable. Join a guild or classes at LQS to learn, make friends, gather tips, and receive advice. Welcome to quilting, have fun with learning and I'm sure you'll do wonderful.