You're living my next big goal! South Londoner currently studying Spanish.As long as you are really good at learning a language completely different to your own, with a different alphabet and pronunciations you'll be fine! I moved to Spain eight years ago to a rural village near the top of a mountain and the change in culture is what I value (coming here from south London). I have seen people pull up outside a tabac and leave their key in the ignition whilst they pop in. The driving is so easy, everyone has lane discipline on the motorway and outside lane hogging is illegal. The healthcare is far superior to the NHS too!
I've lived and worked abroad several times. I did a stint in the US and loved it but I turned down an offer to return during covid due to the politics.
A friend of mine has been all over the world working as an ESL teacher. (There's a paid program run by the British Council for English Language Assistants, if anyone is interested: https://www.britishcouncil.org/study-work-abroad/outside-uk/english-language-assistants ).
The digital nomad subreddits on reddit are probably a good, current guide to what's still affordable/accessible.