Welcome to the board! The most important thing I learned about my featherweights came from an OSMG (old sewing machine guy). He explained to me that because of the tight tolerances the featherweight was made with it is best to always start by holding the threads in your hand with gentle pressure towards the back of the machine when you start to stitch. He also said it was a good idea to use the handcrank to lower the needle into the fabric before stitching. This eliminates the dreaded bobbin thread tangle that the FW can be prone to. Once I "trained" myself to do this, I no longer had the thread tangles in the bobbin.
You will love your machine! I use my FW's for 95 percent of my sewing. Fun to use, portable and perfect straight stitch! A good resource for videos, info and supplies is the April 1930's web site. Their school page is full of helpful info.
http://april1930s.com/school/