Self taught here too. I did take home ec back in the dark ages when they actually taught sewing (made my Jr prom dress in class), but now sewing classes. I have been to 3 retreats were someone would demonstrate techniques, but not really a class (especially since I was one of the teachers).
Both my grandmothers quilted and at least one of my great grandmothers quilted. My mother sews and has done some tops, but no completed quilts. They made utility quilts, nothing for show. Some have cotton batting from their fields that was carded and placed in the quilt then sewn down. They are lumpy, heavy, and full of love. I wouldn't take a million dollars for any of them.