You can use Passport or Gold to migrate to any World without Migration Protection. Please note that the higher Might rank you will be in target World, the more Passport or Gold you will spend.
If your city is Lv 5 or below and created less than 7 days, you can use Rookie Passport to migrate to any World without limitation. Please pay attention that there is Only 1 Rookie Passport for each account, which has a 7-day time limitation, you should use it in time. But if you use the Rookie Passport to other world, you might come back to previous World until the Protection time ends.
You can only bring a maximum of 3m Food, 3m Lumber, and 250k Ore when you migrate. Be sure to use up excess resources before migration to avoid losses!