Nimrod, im sorry you are having trouble in the game. Pls check in the forum for help getting started and/or msg me in game on the world you play and I will be glad to help you more. Thanks to jaelis and the rest for helping.
Now,.. let's stay on topic., pls. There is a thread w lots of great information on Diamond Farming on Arvahall that can help rookies and seasoned players alike. Msg me THERE for an invite to the thread.
Diamond Farming is mainly a term describing the practice of focusing on winning diamonds from doing the recurring quests in the quest line that allows you to abort quests. This can be done at any point in the game, but many prefer to add new cities just for winning diamonds for their account, in addition to doing the quests w the main city they play.
Most agree, diamonds are best spent on city expansions and for opening the extra slots in the Rogue Hideout on the main city you play. My plan is to use all my diamonds on Vingrid,.. whenever it's released. My other cities are just for winning diamonds for that purpose. First, I won as many diamonds as I could farming and from contests, all of which I have saved up; then, I added Wishing Wells(WWs) in mass to help generate more diamonds for my cause in the future.