The first time I tried to FMQ was a disaster. It turned out that my Kenmore, which was great for everything else, wasn't the machine to use for FMQ at least for me. Changed to a Bernina and did so much better. I never kept it up so would have to start the learning process again. Can you try using another machine.
Everyone is so encouraging and have given so many good suggestions; I hope they help and you achieve your goals. Just remember if you decide you are done trying, there's absolutely nothing wrong with you. It just wasn't meant to be.