We have several machines. My wife 1st bought a Singer Comfort Quilter at Joann's for $299. It is a nice machine, but could never get the auto threader to work. I have a Brother PE780D embroidery machine, but needed a straight sewing machine. I went to the Brother dealer and bought a new Runway HS-2000 for $199. Great little machine, but it was a limited edition and I do not think it is available anymore. However, I was looking at Walmart and they have several Brother machines that have very similar functions as the HS-2000 for prices ranging from $149-$199.
About classes, I am sure they quickly get you started and teach you quite a bit, however I just started from scratch, had never sewn on a machine before and between my wife, friends and videos on You Tube I have learned a lot. Not an expert, for sure, but can do most things I want to do and if not can ask others for help or search You Tube for videos.
There are some super "how to videos" on You Tube by Missouri Star Quilters.