At it simplest, a spreadsheet is essentially just a series of numbers and calculations. Those numbers and calculations need to have a purpose. What do you want your spreadsheet to do?
There are several different pieces of software which can be used to create a spreadsheet. Does your access course require that you use any one in particular?
Unfortunately, I'm struggling to understand you. I think you're saying that you need to include 15 different pieces of information about three different universities.
That still too vague for me to be of much help. Do you already have the information you need to put into the spreadsheet? Does it need to be presented in any particular way? Are there likely to be any calculations involved?
I suggest you try reading through some instructions on-line and see how you get on. For example, How to use Google Sheets, here.