If you are thinking about becoming a lifeguard?
Here is the prerequisite for the swimming. You need to be able to swim 300 yards without stopping using the front crawl aka freestyle or the backstroke. Then you need to tread water for 2 minutes. Lastly you have to do a 20 yards swim, dive down 7-10 feet deep to pick up a 10 pound brick then swim back with the brick all under a minute and 40 seconds. Do you think you can do it?