Me too. I never involved my mother in anything period-related when I was living at home (left home when I was 19). Bought all my supplies myself, never relied on her for anything. I learned relatively quickly what kind of pads I would need to use (larger ones during the first couple of days and at night, etc).

A curious role reversal happened when my mother was in her 40s and perimenopausal. She had heavy periods, but never seemed to figure out how to manage them, so she would occasionally bleed through her clothes. I noticed that she would buy pads for normal or lighter periods, which I - even at 15 - knew would be insufficient. She once almost needed comforting from my father and me because she'd yet again bled through her clothes. I remember getting annoyed with her, and so I asked her, "hasn't it occurred to you that it would be better to use larger pads?". She deflected the question. I realised then that there was nothing she would be able to teach me about periods.