The best thing for you to do now is to scour this forum and especially the build log forum for at least a few weeks. Read through the long build threads and especially the criticisms given by the more senior members of the forum.
You'll get a lot of ideas on things that work and things that don't that way. Don't skim them either, read in detail. The especially interesting ones will be the "older" ones that start with an idea and by the end of the thread you'll have a completed machine cutting parts and you can see the logic behind the design changes made throughout the thread. You'll find that very few of them finish exactly with the design that was started!
Do this for a few weeks and you'll find that all of a sudden you're not so clueless about CNC!
-Andy B.
http://www.birkonium.com CNC for Luthiers and Industry http://banduramaker.blogspot.com