That is really tiny! Good for you!
I am an applique beginner having only done one raw-edge and one needle turn so are, but have found that a batik, or other fine, many-thread-to-the-inch weave fabric works better than a regular cotton print. More malleable, less fraying, not so bulky when turned over. The Sullivan book is very good, overwhelming to me, and I have the Eikmeyer also for her back-basting technique.