FMQ takes practice to master - I doubt I'll ever be a master, lol!
I've heard that playing music with a strong beat helps, haven't tried it myself as I like quiet.
Washing and drying the quilted item really does make it look better. I think once you get the tension issue figured out so there aren't loops on the bottom, you should keep going, finish the quilt then wash and dry it. Bet you'll be pleasantly surprised!