Nice job! It's good that you are trying to do FMQ...a lot of people would love to but are afraid. Each time you do it, you get better. Before you know it, your curves will be smoother, stitches more consistent. I found at the beginning I did best at loops and swirls. So I perfected those before I tried to master other designs. It was at least a good year until I was able to do a decent stipple. Now I am doing feathers...thanks to Sally Terry's book Hooked on Feathers.
Save one of your early practice sandwiches. I recently came across one I did a few years ago. It was interesting to see how far I've come since then!