Welcome aboard! We can always use more sailors/builders/dreamers here. If you want to build your boat, great! Been there, done that, and will do it again. One place I learned a great deal from (although the atmosphere can sometimes be a little insufferable) is the WoodenBoat forum.
The WoodenBoat Forum
The focus is on building,fixing and restoring wooden boats of all sorts, which complements the focus here, which is on everything else.
sailingfool has a point- if you want to sail NOW, buy a boat. There are lots of great choices in your budget and the size you are looking for, and you will likely get more bang for your buck buying a good old boat than you will BUILDING one. in fact, with a budget under $3k, you definitely will be hard pressed to build a boat that will be as good a sailboat as what you can buy in the used market.
But don't think your collection of tools will go to waste! Nay nay, young man!
See, a boat is just a vessel into which we pour our hearts and souls, making her OURS. We fix, we modify, we improve, we curse previous improvements and repairs by previous owners, we find ways to personalize our good old boat.
Start reading. Much can be learned by browsing this site and others, and in the world of pulp and ink, pick up copies of Good Old Boat, Small Craft Advisor, and a copy of Casey's This Old Boat.
Keep asking questions. As the cliche goes, there aren't any stupid ones.