AARL, great resource.
Homepage:
http://www.arrl.org/
All about licensure:
http://www.arrl.org/licensing-preparation-exams
Here is their posting and pdf of part 97, the rules of radio:
http://www.arrl.org/part-97-amateur-radio
All about HAM, products, and forums:
http://www.eham.net/
This site I found very usefull and well layed out. It was the one I went to most before passing the exam.
http://aa9pw.com/radio/
Bands/license allowances in the US, in a (sort of) easy way to read (posting from my tablet, this may not work. Google AARL Ham bands, you'll find it.):
www.aarl.org/files/file/Hambands_color.pdf
Another great reference, especially for finding what repeaters are around or emergency personnel channels (FD, PD, EMS, etc):
http://www.radioreference.com/
Licensing, at least for me, meant driving to meet a few VERY friendly volunteers to give me a short (35 ques) multi-choice written test. It cost iirc 15$, which is for 10 years + a 2 year grace before expiration. Best deal in town.
I am a Tech class, the lowest available; you can usually go general (second up) if you can pass the Tech, it is harder though. Or so I am told. I just wanted a 2 meter band for now, so I went Tech only. I can reach many repeaters, pretty much anything within 40-50mi of my Jeep, without turning by broadcast strength past low (5w). My radio is capable of 75w TX. You will be heard on 2M, especially if repeaters are near. 4 of the 5 counties surrounding me use the band just above 2M, in the 150-160mhz range, for all their emergency comms - which I can listen to, as long as it isn't trunked. I live in the sparsly populated mountains, cities tend to be digital or trunked now. But being in property management it is nice to have, I have heard 3 distress calls from houses I know the owners of or watch. Sometimes the stuff I hear is better than any movie you could write. Sometimes you know what road to take or when a firetruck is gonna come up behind you.
I use a Yaesu FT-2900 2M mobile transceiver. I like it, it has a massive heat sink built in which is great if you are long winded or have to juice it up. I use the heat sink to use a cable gunlock to secure mine to its mount. The only thing I could say is a detachable face is much easier to mount, and nearly all duel band (or more) radios have them. I also have echolink, an app for that from the Play store. It lets me use my tablet on any linked repeater. You must have a license to use this app at all.
Tons to learn, but I think it is a LOT of fun. That should get ya guys far enough to know if ya want more or not, lol.
Happy to answer, as usual.