I learned from watching my Mennonite mother and two older sisters. I was about 12 when I was allowed to sit by the quilt frame and quilt. I learned to chain piece by machine that I still use today and the use of templates, grain of fabric, how to straighten fabric that was uneven when folded shelvedge to shelvedge, judging a yard of fabric from nose to arm extended, learned the names of fabrics, how to make my own quilt frames, baptist fan quilt marker from cardboard, and so much more.
At 80 years old I have learned there is always more to learn.