See how on the back your eyelashes are on the curves? That's almost always because you are moving you fabric too fast on the curves. The long stitches on the front also indicate you are moving the fabric too fast or are running the machine at too slow a speed. A good thing to remember is feet fast, hands slow, in other words fast speed on the machine and move the fabric more slowly.
If there is any way at all that you can take a FMQ class at a LQS in your area, I would really advise it. I practiced a lot but when I took the class just a couple of comments from the instructor really made it all come together for me. If you do take a class, make sure you bring the machine that you are going to use at home.