start small, make placemats or even pot holders and practice and as your stitches become more even and you can make some designs start getting larger and larger until you 'ease' into a bed sized quilt. it all takes practice but if you start small it will not take that long to be doing large quilts. there are some amazing quilters out there that manuver huge quilts on a regular sewing machines and do fabulous designs. just remember practice makes perfect.