PRACTICE PIECE!!!!! That's beautiful!
I've done free motion once and I did it on a 'busy' kaleidoscope top, so the variable stitch lengths don't show THAT much! LOL
I did some practice pieces first (nothing I would show here though!) and then went 'live' on a full bed quilt: that had it's own challenges just because of the sheer size of it! If you like a tipple, they say a glass of wine to relax you helps!