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 ZinsserNever hesitate to imitate another writer - every person learning a craft or an art needs models. Eventually you'll find your own voice and will shed the skin of the writer you imitated.
William Zinsser