Welcome, Kaffa! There are quite a few resources here that will help you out. The manual is of course a good place to start. The Dominions 3 FAQ and the Strategy Index sticky threads are good stuff and after you have gotten a little bit more familiar with things, you can find more things in linked from my sig and Ballbarian's.
Others too. I hope you enjoy it here.
Oh, and absolutely no problem with your English. No need to apologize for it.