Nursing pre requisites

Hello, I am wanting to get in to the after degree nursing programme at University of Calgary. I was told I would have to do some pre requisites, mainly from Athabasca. I need 6 credits of approved Human Anatomy & Physiology, 3 credits of Statistics, 6 credits of Arts/Humanities/Social Science (of which 3 credits can be a language other than English or fine arts course). Has anyone done this before? I was just looking to get some pointers, did you do them all at once? I probably won't meet the March 1 deadline, but I do want to try and if I don't make it, I would be applying for next intake. Thank you!