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The best way to learn how to lead is to follow a compentent leader and observe their placements carefully as you remove them. After you follow a climb and clean it (without falling), then go right back and lead it as soon as you can. You will have confidence on lead knowing a) where the placements are, and b) that you already did the climb without falls. Good luck and be safe.
Or you could just lead the thing.... you gotta start sometime.
True though I don't think Kiddy Crack is a good first lead at the grade... The Chimney at Square Ledge, and West Face of Square, are far better 1st leads...