We are being as helpful as we can be. If you already own it--if you got it free with your computer--then try it and see if it works. If you don't like it after a week or two of classes, you can stop using it. Then post here for some other soon-to-be 1L and tell them whether you like it or not.
If you don't already have it, I already gave you my best advice. Five years ago people at my school weren't even typing their notes...today, I don't know a single person who uses something other than regular word-processing programs on a computer. I also know several people who still take notes by hand. I tried my best to be helpful--I don't think that One Note is necessary--save your money.