Disadvantages: Long-term large-scale exercise, muscles will be very developed, girls will be very developed. You should know what the concept is. See which female professional athlete is not hip breadth with thick legs and wide shoulders. Otherwise, where can she get the strength to race against time?
Generally speaking, swimming is a healthy and green sport. It's a good thing if you do proper swimming. I suggest you learn breaststroke and exercise your endurance slowly. It takes about 1 hour to swim 1000 meters. Even if you don't swim, you can lose weight by soaking in the pool for 4-5 hours every day, let alone swimming. I exercise for 6 hours every day and lose 8 pounds a month. Although I don't want to lose weight, I'm still losing weight, so I hope you don't do too much exercise. Exercise means mastering a certain amount, and you will be handy.