Swimming to stay in shape

I've been swimming as a way to stay in shape which is not that likely to lead to injuries. And being in South Florida, I can swim outside 12 months a year! I've even thought of putting a harness onto my home pool so I can train there (my home pool is too small to get much practice. So now I'm trying to improve my stroke. I had myself videoed, what do you think? I think that I should learn to kick properly:








Here's another video of my stroke from October. I was at my least in shape at that point. I look at this video often to give myself motivation.