Getting back to the original subject I think it is hard to make a move to another country unassisted. I only moved once for a four year posting overseas by my employer but that was a different matter.
I knew it wasn’t forever but a good 4 year stretch appealed to me as sufficient time to get immersed in a different culture and language, although I could speak that fairly fluently already.
Living there I acquired a live in boy friend so the assimilation was pretty complete with his friends combining with mine that I acquired on my own.
All good things come to an end though and my job there ended after 4 years and my relationship with my bf a half year later.