swimming is like walking for me
the main things is your legs and arms
to practice ur legs u need to grab on the side of pool and try to move ur legs likes u do cycling(for the basic) .
and then ur arms not such a bigger problem because u can move ur arms automatically when u try freestyle,frogstyle e.g.

I prefer find a coach to teach u how to swim properly and then I guarantee about a week u will be swim like a pro and joins the olympic 2016 xD