I was in the exact same situation and it turned out really well, so don't be nervous. Just make sure you ground yourself and don't walk around on carpet. If you have a good manual, it's very easy. Be very delicate with your motherboard connections, especially the CPU. Don't force anything (except sometimes the RAM will fight back when you try to push it in). Took me about 3 hours to get the PC up and running, including Windows and a couple of games.