Also, the wiki is a good source of game info in additon to exploring all the "help on xxxx" links in game.
Jackson is correct though, there are plenty of vets willing to pass along their knowledge to a new players if you play with them.
If you want to net, I recommend ICD, PANLV, TKO.
If you want to war, I recommend CC or NBK.
There are other clans as well, but those 5 are where you will find a few people willing to help.
PS, I am in CC.
http://cc.ghqnet.com/