No need to pray, there is a handy guide
to help you put it together, with nice fingernails to boot.
Should you have other questions, there are other forums to post your questions. However if it is related to this one build, may be you can try our System Builders
You may be able to get some answers immediately by looking into this
once you put it together.
Not going to bore you with details, but Nvidia/AMD usually overstates the wattage requirements to make sure that they can cover most PSUs, including those crappy ones that tend to exaggerate their wattages. The 380W PSU included with the Antec is a good quality PSU so it should be good. Around here we usually don't look at the wattages too much, it is all about the 12V amps. Should you really feel uncomfortable you can always move up a notch to the Sonata III or the NSK 6580.
The Model M is not for the faint of heart. You either like them or hate them.
Gerbils unite! Fold for UnitedGerbilNation, team 2630.