Summary of school magazine

Today involves me writing a summary for the purpose of my school magazine, and identifying who my target audience is.
I will be making a magazine aimed at young boy students in secondary school with an age range of 11 and 18 year olds but with a secondary audience of parents, consisting of all nationalities and religions.
The purpose of the school magazine will be to tell the students what is going on around their school, talking about what trips have been organised or are being organised at the current time.
The front cover of my magazine will include a picture in the middle of the cover, of a student in medium close-up, holding either a basketball or a football in their hands...possilby about to either kick the football or throw the basketball, I may however include one or two more images of students around the school. As my front cover is based on my school Kelsey Park Sports College the colours I am going to be using are a light yellow combined with some black, as they are the school colours.
I have to make sure that I have a border, making sure that I do not put any pictures or text outside the border of the cover.
My knowledge of InDesign is okay, but I would like my knowledge of it to be better, hence why in the coming weeks of making my front cover, I will be asking help on how to use InDesign much better than I already can.