You'll really like fly tying. It can be as addicting as plastics, and inline spinners, and pouring jig heads, and rod building, etc., etc., etc. It gives you something else to find when you're out shopping with your wife. I don't mind looking around some departments in stores because lots of items can be utilized in my many addictions.
Crafts dept., kitchen utensils, sewing dept.... they all look different to me now.
Have a good time at your class.