I was taught by Miss Sutherland, a little old lady of at least 110 years, in 8th grade home ec. -- a 12 week course. Never finished my blouse, learned how to make horrid hot chocolate from unsweetened bakers chocolate squares (Give me Nesquik any day!), and I think we peeled and cooked potatoes to mash. Beyond that I learned by reading books, patterns, sewing machine manuals, and trial and error. I still don't make clothing for myself, though I sewed some truly lovely dresses for my little girl many years ago.
Jan in VA