Pre Med

I am a highschool student who has been accepted to UM; however, I am wondering how being a pre med is at this school. I am going to be entering UM with my AA degree already; therefore, by credits I am going to be a junior.I went and visited UM and I loved it; however, it expensive. I am wondering if it will be worth it to attend UM over the University of Florida. Will UM provide a advantage for getting into medical school. Also on a scale of 1 to 10 can you please describe the rigor of this college, I am a little scared that college will be to hard for some reason. So basically what Im asking if someone can fill me in entirely on being a pre med at this school so I can see if this university is right for me.