Just starting out (again)

Hey, as some of you may remember, I posted here a while ago asking some other noob questions (lol) but sadly took a loooong break from guitar because of a lot of homework and soccer. I'm now gonna start practicing the guitar daily but have a few questions first. *Note: I cannot afford lessons at the moment

I want to play rock, and have a few books, but they are not rock books. Here's the one I am currently studying: http://www.amazon.com/gp/product/0871663546/sr=8-1/qid=1154148273/ref=pd_bbs_1/102-7029132-6616156?ie=UTF8

I don't know if I should keep studying out of books or if I should just learn the chords. I'm starting to worry, though, because on guitar forums and sites guitarists of every level (begginners included) start talking about riffs and scales and hammer-ons and pull-ons.. I just don't understand.

I was subscribed to this website, but after I finished the very begginners course I had no idea what to do and searched the begginners stuff but didn't understand it much.

Please help, thank you!

chords are always good...so i wud recommend them :)

chords are a great place to start eg start with basic major chords,A,C,D,E,F,G and then their minor counterparts and then start filling in the gaps, that should give you a good grounding for fingure strength and movement, practice changing quickly between chord.
simple scales like the pentatonic major and minor are good too
hammer-ons, pull-off, slides etc are all techniques your will need to learn

the internet is a very good resource and alot of this can be found there and people in this forum will be very willing to help

I recommend John Petrucci's Rock Disipline dvd/book lesson.

Alright, thanks guys. I'll start learning chords and I'll check out that book and DVD on amazon.