FMQ is a lot harder than it looks. I tried it once on a quilted binder cover I was making and it was so frustrating. Still sitting at the top of my closet unfinished two years later. On the very first quilt I quilted---a quilt made of light and dark denim squares---I just had x's going through every other square. You think sewing a diagonal line through a square would be easy, but even that was a chore.
You can keep practicing (I'd start on some smaller projects instead of a quilt) and if that doesn't work out you can just bring your tops in to a long arm quilter. No quilter in their right mind will think you're any less of a quilter if you go to a LAQ.