If you just discovered boat building, very soon you will become aware that there are TONS and TONS of different boats you could build. For some odd reason, many sailors think they should only have one sailboat - please realize it is perfectly OK to have several (or many) sailboats at the same time. Consider building a puddle duck to get some experience and have fun sailing with other duckers. The lessons you will learn will give you better understanding of how to build boats and make your next project go a lot faster. The duck is big enough to carry a 2nd passenger but small and easy to store. If you lose interest or don't have time, then stand her upright in the corner of your garage or out back till you get the itch to go sail her again.
For many people that build ducks, it is their first boat and they don't know how to sail either. Sailing is easy, just point the boat in the direction you want to go, then pull in the sail till it stops flapping. The best way to learn is to have your own boat and take her out on a very light wind day, on a very small lake and give it a try. Take a set of oars, if you can't figure out how to sail back then drop your sail and row back. If you know a sailor then invite them along and they will help you out, the PDRacer can easily carry 2 adults.
All boats leak especially wooden ones. Just because it might leak, doesn't mean you will sink, that is what the airbox flotation chambers are for. Besides, when you are sailing on a very windy day splashing along you will get more spray water than from any leak. Take along a bottomless chlorox bottle and when the water gets to about an inch deep inside the cockpit just do a couple of scoops to flip the water out.
If you are worried about capsizing, see our info about emergency flotation and recovering from knock down pages. Then go practice capsizing with your duck tied to the dock with a long line. After you learn how to recover from a knock down, you won't be afraid of them anymore.
A big part of puddle ducking is to continually tinker with your boat to improve it. Figure which configuration attracts you the most and start building it. Later if you change your mind, you can reconfigure her or just build another hull and move your parts over. They have almost no resale value so no matter what you do, she will be worth the same.