Yea, what sleeper said. Some people can be harsh on the forums, but most of the people here are really nice. Pay them no mind
To lay this out in list fashion...
1. Deport yourself from your current kingdom (contact your local tribunal leader and ask them to deport you. You should receive a message saying "You have been deported from XXX!").
2. Immigrate into the new kingdom (Contact the tribunal leaders there and ask them to immigrate you).
All kingdoms have a tribunal except Teron, which has the housing authority which you can do some neat stuff and get immigrated automatically (though you still need to be deported).
If you can't figure out who the tribunal leader is of any kingdom, one of the best bets is to ask any PCs you see on the street or hang out in the inn for a while. If that doesn't work, try asking in the Exile Inn or sending a tell to somebody who looks important on the who list.
Now, if you figure out the leader name but can't seem to catch them online try asking another tribunal member to get in contact with them for you. If that also doesn't work, try putting a note up. If that STILL doesn't work, send an e-mail to the IMM in charge of that tribunal (IMM responsibilities are listed in the announcements forum).
Good luck and welcome to SK.