Get rid of the safety pins. LOL They will murder your hands slowly. There are many great basting glues and sprays to use that works great. My first time machine quilting I glued every inch of the quilt. It wasn't stretching anywhere. It was like quilting paper. I didn't have to think about puckers or pleats just concentrated on my quilting. Now I can lightly glue baste the quilt and keep it all flat. Don't get discouraged, keep going and don't stress over it. A generic walking foot will work for your machine. They are not expensive. I like using the serpentine stitch for quilting with the walking foot.