Becoming a virtual tutor and/or teaching english to children are great side hustles for anyone who has a good working knowledge of key school subjects and/or the English language!
Re tutoring - depending on which company hires you, you might not even need experience in tutoring! Some businesses prefer people with A levels or GSCE’s, while others only require a general knowledge of a subject.
The Tutor Hub, Owl Tutors, Tutorful
Re teaching english - don't worry, you don't need to be bilingual (although it would definitely help!)