First, read the books you can find. Then go do some aid climbing with clean gear. Just pick a crack that looks like it goes all the way to an anchor and start pluggin gear. Don't worry about style or grace. Put in a zillion pieces. If you think you are going to run out, place four or five pieces, weight them equally, and rap off and clean what's below you. Prussic or jumar back up and keep going. I have been climbing since the seventies and have helped a lot of people get started leading. IT IS THE MOST DANGEROUS TIME OF YOUR CLIMBING CARREER. Devote at least a few climbing days to aiding with a clean rack. Do a variety of routes. Wear old shoes, knee pads, and a helmet. You will want a fifi hook or at least a daisy chain. If you can find someone patient enough to belay, you are in fat city. If not, set up a top rope, or a fixed line and tie figure 8s as you climb and clip into them. Have 2 locking biners so you are clipped into one figure eight in the fixed line at all times. With a fixed line you can rap and prussic at will.After you have gotten bored with aiding and are ready to put your ass on the line, do something very easy so you don't have to worry about falling. Get used to the way leading flows. Establish a system you use at almost every placement--- establish a good stance where you can get a piece in, remove the piece from your rack, place it, test it, clip a runner or quik-draw to it, pull your rope up, clip in, test the rope running, screw up your courage and move to the next stance...............
Very few really ballsy climbers live to a ripe old age. At least not without injuries. Statistics catch up eventually. Be careful. Progress slowly. Focus on having fun, not on what other climbers might think about your style or abilities.