Identifiying my ideal reader

Today i was researching on how I'm am going to present my college magazine. I was looking on what age i am going to attract and how attractive my magazine is. I looked at a few magazines, for example Rock star magazine. i looked just at the front cover and stereotypically suggested that young single university students would read this magazine and they are not very rich . i had a few questions to answear, for example, what breakfast do they eat, and i wrote they eat left over takeaways because its quick and easy and it tastes good. for my magazine i am going to target the ages between 16 to 20. the reason is, i want to target older students and young students at the same time. the people who are going to read my magazine will probably be middle class and working class or working lower middle class. I want to target ordinary people who love art and have a passion for it.