My mother taught me the very basics and then I was on my own. First project at age 7 was a doll the same size as me that wore my clothes. I made most of my clothes starting at age 10.
First "quilt" was when I wanted to take my ugly blanket to college. My mother suggested I cover it. I cut simple squares from scraps of clothes I had made for myself, my sister, and my Mom. I still have it and it reminds me of things like high school musical costumes, various Easter dresses, flamboyant shorts, etc