There's no subject you don't have permission to write about. Students often avoid subjects close to their heart ... because they assume that their teachers will regard those topics as 'stupid.' No area of life is stupid to someone who takes it seriously. If you follow your affections you will write well and will engage your readers.
William ZinsserDonโt try to visualize the great mass audience. There is no such audienceโevery reader is a different person.
William Zinsser