To travel to a place, in the profile of the region of interest, select the "Travel here" button and start to move, which takes a few minutes (the farther you are from the region the longer it takes to travel)
However, this is not always possible as most regions have "closed borders" and there is no "immigration agreement" between the country you want to go to and where you are. Selecting the button will stay red and will not allow you to scroll.
To be able to travel there you must get either the residence or the work permit, which are requested in the same profile, selecting one of the buttons:
Once selected you have to wait for it to be accepted or rejected.