My mother took me to pool safety classes when I was 9 months old. Just the basics ... relax, paddle to the edge, find the stairs. Honestly I don't remember it, but my parents were very keen on my safety when we had a backyard pool, even with a full perimeter fence.
I really learned to swim when I was 11, immediately practising with a starter group and quickly progressed to competitive swimming. I love to swim, to compete and helping other children learn to swim.