The most important rules being: to have fun and don't try to cheat! You should get along fine as long as you use common sense. However we have set a few rules at TKOC and we suggest you to take a closer look at them.
All the rules
You might also wonder how you can sign up for TKOC? You can read more about it here
Finally remember that the TKOC community is always willing to help you in the world of TKOC, especially if these are your first steps in this world. You can always get help at the forum where other players will answer your questions.