What exactly are you having trouble with? If you tell us how far you’ve gone, what you’ve done so far, what versions of MODx and snippets that you’re using,etc. and then pinpoint specific issues that you’re running into, we will be better able to help where we can.
Incidentally, if you’re using Evo, I recommend you use 1.0.5.
For aggregating your posts, use Ditto for MODx Evo and getResources for Revolution
For commenting, see Jot for Evo and Quip for Revo
For paginating your posts, Ditto has a &paginate parameter, and for Revo use getPage
etc etc
You may find some of the material here useful:
http://codingpad.maryspad.com/beginner-tutorials/