Not that hard if you are in young to middle years and have any job experience. I asked Perplexity "If an American citizen, a trained engineer with some experience, desired to work abroad in the EU or an English-first nation, what are some good websites to check?"

I suggest you do the same -- the reply lists a dozen promising sites.

https://www.perplexity.ai/search/if-an-american-citizen-a-tr...