Here's a great post from one of our very own on tools you can use to make it easier:
http://smith-wessonforum.com/smith-...8269-new-ars-here-some-tools-i-use-clean.html
As to cleaning the rifle, lots of videos on you tube, and lots of good references through Google/Bing, whatever.
If you really want the best and last word on AR cleaning and maintenance, get a copy of the Army's training manual.
Google:
TM 9-1005-319-23&P
It's also available in PDF format on line for free, but I like to have a hard copy on hand.