Warmoth parts are good, USACG are very good... Either will sell you parts that fit, and work with you if something goes wrong. My colleague Tuxedo Poly's advice is the same advice I always give somebody who wants to learn. Buy a used guitar that's all there (or mostly there ) and experiment with it. Mod it, grind it, sand it, abuse it and make it work. And most of all, learn to solder. If it goes well you'll learn a lot, if it doesn't go well you can always sell of the parts and start over. You can buy used Squiers these days for a hundred bucks, and if it has problems it can be had for a song.