How can a passport holder of Antigua and Barbuda live in either?
You did not specify your age and how much money you are willing to spend. If you are very wealthy then you can invest in any country of your choice and settle down their without any problems. If you are not that rich then no problem you have other routes too. Apply for American University and get admitted their. You are eligible for 3 year OPT post successful completion of any STEM degree. Eventually you will get H1B. Canada and Australia do not have visa system. They have point based immigration system. Go to their respective CRS score calculator page and find out whether you are eligible for PR. Most of the pages are self explanatory and very easy. UK has tier 5 youth mobility scheme but only few countries' nationals are eligible. Check that out. If not UK is out of league because UK immigration laws have become very tough. New Zealand I don't know People will ask you to directly apply for jobs and blah blah blah. But trust me that route is extremely difficult because Employers usually cannot hire foreigners