You're almost there then. Installing the CPU, power supply etc etc really isnt hard. Most parts comes with a manual anyway so you'll know what wire goes where and so on. You just gotta read up on each individual parts, make sure they are compatible with each other, which bits you'll need. Here's a pretty simple guide I first read when I built mine, there's loads of guides out there, have a search around and you'll definitely find what you are looking for.