Don't be concerned with all the attachments now, learn the basics first and then learn to use the attachments. Make sure you are using the correct thread for your needle size, set it at 5 to 6 stitches per inch, and set the servo motor to go slow. When you first start stitching your leather, hold the top and bottom thread towards the back for about three stitches, this will eliminate a lot of thread bunching problems. Do not try to force your leather, let the machine go at its own pace.