Start small. Do up a few practice blocks to experiment with the machine applique. You can try out different stitches, adjust the width of them if you need to. It will build your confidenct to tackle the quilts. You will have better luck if you use a stabilizer under the block. I use a tear away, but there are other kinds. It reduces the puckering you get with the fancy stitches and looks much better when done.
YouTube is a great source for demos!