If you're a native English speaker, the easiest thing to start teaching is English.
fundamental English for primary students, the school provides the curriculum, some training and an assistant in the classroom.
Teaching English doesn't require any sort of credentials, although I recommend getting an accredited tefl certificate because they last for life and instantly boost your pay by 20% or more, as well as giving you some baseline information about teaching english.
dozens of countries want you to go teach English, english is a very in demand skill.
China has literally thousands of job listings by itself. Pretty much every other country in Asia, Africa, and Europe that is not primarily English speaking is looking for English teachers.
it really would be easier to list the countries that are not looking for English teachers.
there are dozens of countries, hundreds of websites and thousands of jobs waiting for an English teacher right now.
and the cost of living is so much lower that there will be instant financial relief.
check out the comments I wrote to the other people asking how teaching works in this post, I go in to a little more detail.
and feel free to ask me more questions.
"...you mean"
nope!
"...Europe is likely to have a higher average cost of living yhan the US"
it definitely doesn't; the average European cost of living is much lower than in the US, especially in the context of traveling.