Another former swimmer here - summer camp had someone who coached during the school season so he gave us the benefit of his knowledge. I was best at breaststroke, though I did prefer the crawl (as it was known back in the mid-sixties).
DH and I tried to go for a bit at a community centre and at a high school. The chlorine in the water killed our eyes, even with goggles. We also were so out of shape that after 2 consecutive lengths of the pool and I had to take a small break. DH had to stop after every length. Too tiring. We could barely pull ourselves out of the pool after about 30 minutes.