Welcome from Tennessee. Yes, those accurate seam allowances can make a huge difference. The more seams the more room for error. You can quilt on your machine. It make take a bit but is doable. Start from the center and work outward. Then turn the quilt and work from the center outward to the other edge. Just take it easy and be proud of the accomplishment you have done. Done is better than perfect. It is a learning process and should be a fun hobby. Don't sweat the small stuff