My DD9 got her first Mac at 2-years-old. Now 6+ years later she is a pro. When we go to the Apple Store the geniuses, who all know her by name love to show her off to potential Mac customers. When I upgraded her to a Macbook a couple of years ago it came with 1 year of free classes and "one on one with a genius" sessions. My daughter took a few classes but felt that "the other students were slowing things down".
While she isn't building complex spreadsheets in Numbers, she does use iTunes, Safari and iWeb like an expert thanks to those classes.
The Mac is incredibly easy to use and you will adapt quickly. The hardest thing for me to remember is that the CTRL keys just isn't the same on the Mac... and the Red X is now on the top left.
Psst, if you really, really have to... You can use Bootcamp to load both OS-X and Windows 7 on your machine. Or you can use VM Ware, Parallels type programs to run it in a virtual environment.