Swimming?

   Yes, I could not swim at all and I learned at the age of 21, as soon as it gives you pleasure to do so. You can also try athletics once you have trained so far.

   Not only is it worth it, I learned at 24 now I am 28 and another day I am at the Burgas marathon 7km.

   It is absolutely worth swimming. Don't worry, people much older than you turn to a coach every day because they find that while they can swim, they don't swim properly and need to be cleared of their style and told where to go wrong and how to regulate their breathing. You are at a wonderful age to start, especially since this is something you do for yourself and your body. So, boldly to the pool! It is important that the first few workouts just have someone watch you and show you how to correct you - you will get used to it quickly, and the pleasure of swimming, as well as the benefits for tone and self-esteem are incomparable.