If it is, you are in luck. The folks at http://www.thatsfit.com/ just made it a little easier to started. This post from Deborah Dunham at http://tinyurl.com/yz8q962 offers perfect information to the person looking to start a swim program from scratch.
The post includes information on what you'll need to start and some beginner workouts. If you have access to a pool, swimming is a very effective low-cost and low-impact form of exercise!