See if you can get your hands on Diane Gaudynski's book "Guide to Machine Quilting" She has tons of helpful advice.
Teeny tiny stitches mean you are moving the sandwich too slow for the machine speed. There is no reason why you can't go a tad slower in speed or try moving the sandwich a bit faster.
I found my "natural" abilities lie in Longarming. I never was very good at FMQ with my Bernina. Maybe if I had one with a stitch regulator. I still prefer moving the machine over the sandwich then moving the sandwich under the machine.