But most people are probably moving for work, without any family within hundreds or thousands of miles.
There are nearly two dozen industries in which people can obtain a work visa, including academia, engineering, journalism, art, law, medicine, and entertainment.
Past ex-pats have written that English-teaching jobs are the easiest to come by, as there are so many resources and positions available to newcomers. There are also ways to go through recruiters for non-teaching jobs from overseas.
In any case, your employer will handle the COE to get your visa for you once you’re hired. (The hard part is getting the job offer at all.)