When I first began doing FMQ I found that the flatter or thinner the batting was the easier it was for me to work with and manipulate thru the machine. I even started practicing by using flannel instead of batting. Cotton batting seems to be a bit harder or bulkier to work with. Polyester or poly cotton will be easier to work with. With some polyester in the batting you will not have to worry about any bearding and there will be less lint building up.
Try using flannel for practice pieces and once you figure out all the things you have to get used to, you could switch to a low loft or thin batting. I stay away from the higher loft or thicker battings as I prefer flat quilts.
Don't give up. It does get easier! Barb