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 ZinsserThe most important sentence in any article is the first one. If it doesn't induce the reader to proceed to the second sentence, your article is dead. And if the second sentence doesn't induce him to continue to the third sentence, it's equally dead.
William ZinsserWriting is learned by imitation. If anyone asked me how I learned to write, I'd say I learned by reading the men and women who were doing the kind of writing I wanted to do and trying to figure out how they did it.
William Zinsser