yea, u can go online to find guides on how to build the computer, but your motherboard manual will contain all the connectors and how to use them, so the only part u need to find out is the simple mechanics of it. I used to think building was hard too, beofre i tried it myself. Its easy, but i made huge mistakes in my buying choices, like getting a socket 478 and AGP mobo
meaning that upgrading will cost so much more.
If you decide to buy parts and build it, hit me up on AIM (ZeroStrife49) or email me (ZeroStrife49@gmail.com)and i can tell you the mistakes i made so you wont suffer.
for 2000 bucks, you can build a pretty sweet computer..i only had 800.