During primary school, my parents paid for my swimming lesson. Attended few lessons, but too scared to go again because the coach throw me to 5m deep water to learn floating.

Then during my internship. near my office have swimming pool. After work,together with other intern going to swim once a week, and I able to swim before the intern end, Probably 2 month (8 times). Self learning plus friend watch over you incase you drown.