You should not have to use a stabilizer because you are sewing thru multiple layers and they have been fused. You do not have to backstitch (I sew a couple stitches over the beginning stitch). Mark your circles and shorten your stitch and you should have a nice circle. After stitching, cutout the center of the fusible. You only need an outer edge to fuse down the applique and then it will not feel stiff. I used to do the turn edge and avoided adding appliques whenever possible. With this technique, I happily add them to lots of projects. Since it is fused, I do not satin stitch. Depending on the project, I might use a zigzag, but, more often I use a blanket stitch. With a bit of practice, I think you will find this is a great way to apply appliques.