Check for a class on using a serger - a not-quite-local QS had a class a few years ago, the instructor began by making us take out all the thread and re-thread the machine until we were comfortable with it, then having us practice stitching, lowering and raising the cutter, etc. There were 6 or 7 of us in the class, each with a different machine. I then took a class on how to make a quilt using the serger for every step except stitching down the binding. If you can't find such a class at a quilt shop, check out continuing education offerings, shops that sell sergers, etc., I'm sure you'll be able to find a class that will acquaint you with your machine and give you a good foundation. You will love it once you learn how to use it.