Leah Day has a list of things to try to improve FMQ . Last year having my left hand in plaster could only use right to do FMQ . I purchased a circle, forgot name. Only problem was it only did a small area at a time. I also did do quilt as you go and found the blocks easier to quilt as I could grab the block with right hand and just place plaster on the other side as a gentle guide.
Good luck.