I have never tried FMQ, but I just read a thread where someone was successful with swirls or loops...and it was her first attempt. My friend who taught me to quilt always says that if you have squares, you ought to put curves in when you quilt. Maybe you can practice some of those. Me, I am just sticking with SID for now. I like it and am fairly good at it. I will look forward to reading other responses you get. Maybe I can decide to FMQ also, but just maybe.
By the way, I love your quilt!
Dina