you can certainly do embroideries for your quilting if that is what you would like to do, or use any decorative stitch your machine has. just because it is called quilting does not mean it has to be little straight stitches, it only means stitches are holding the sandwich together. have fun with it.
but to get better at fmq'ing, you just need to start small and practice. start with about 12" blocks, sandwich them quilt them you can either make pot holders out of them or placemats, table toppers, tote bags..lots of choices to use your quilted blocks. but if you start small and as you get better and better make your practice piece larger and larger...before you know it you will be doing large quilts beautifully.
it just takes some patience and lots of practice. we have all had the same struggles.
but decorative stitching works beautifully too...