I will keep it short and straightforward: as someone who has lived abroad on and off for the past five years in over nine countries, most people I have met working as a “digital nomad” have been teaching English online. As long as you have a strong understanding of English, it can be pretty easy to obtain a teaching job online, even without any formal degree. Usually, if a degree is required, they are looking for the TEFL certificate, which can easily be obtained online.