Mostly people studying to complete their GCSEs in this year

I am a student looking to strengthen my own knowledge in the classroom meaning I am already vastly aware of the subject that I would be teaching preferably maths .Having a younger sibling who I have had to tutor my whole life i believe has given me the skills that would allow me help other. Furthermore in my school I was part of a team that would help students in years below us come to us for help whether that was for tests they have coming up or homework we would help them so I've already worked with a vast majority of students.