Hi, i love swimming! do you like it?
I do enjoy it!  I am not very good at it though.  At what age did you learn to swim?
I started at ag 9 in school and had a few lessons. Swimming lessons is the process of learning to swim :) 
I feel like I may be too old for swim lessons.  Do they even have lessons for adults?
Yes of course, even from a young age humans can hold their breath underwater, within weeks of birth! 
You are kidding!  A baby can know to hold it's breath underwater!  That is amazing!
I would suggest taking up swimming for sure though, it is consistently among top public recreational activities and in some countries swimming lessons are part of the curriculum
Thats smart that it is part of some curriculum.  It makes sense.  Swimming is good exercise as well, right?