Looking for help/good forum for building a computer

I would start by reading the motherboard manual before ordering. I download them and at least glance at the installation and memory sections. Good manuals will give you plenty of info on installing the cpu, heatsink, and memory. I always do a bare post on a non conductive surface before mounting the board in the case. I even suggest removing the power supply from the case if the cables won't reach. Once you establish the board will post with your cpu and memory, it makes it easier to proceed with confidence.

Here's a thread intended for a system that won't boot:
Boot problems
http://www.tomshardware.com/forum/ [...] t-problems

It contains a building checklist covering many of the common mistakes and ideas about troubleshooting. It's worth reading ahead of time.

What o1die is talking about is breadboarding. Here's a link to something I posted a while back:
http://www.tomshardware.co.uk/foru [...] _13_0.html

And don't be too nervous. At some time or another, we all had a first build.