if u want to DIY, then u better have some skill in the "arts". The best is starting out with a cheapo guitar preferably a Kapok. Just check this website for some tutorials.

http://www.fretnotguitarrepair.com/ElectricGuitarRepair.htm
http://www.projectguitar.com/
http://www.reranch.com/reranch/

hope that helps.