NGL, not asking for a friend. Given the current trends in US politics, it seems prudent to at least look into it.
Most of the online content on the topic seems to be by immigration attorneys hustling ultra rich people. I’m not ultra rich. I have a job in tech, could work remotely, also have enough assets to not desperately need money if the cost of living were low enough.
I am a native English speaker, fluent enough in Spanish to survive in a Spanish speaking country. I am old, male, cis, hetero, basically asexual at this point. I am outgoing, comfortable among strangers.
What’s good and bad about where you live? Would it be OK for a outsider, newcomer?
Here in Scotland / the UK you’d be absolutely fine so long as you’re a decent person. There’s not even a language barrier beyond dialect, and dialects vary hugely within the UK and each part of the UK anyway. Just please don’t insist that your great-great-grandmother is actually from Clan MacWhatever.