It's really easy, it will guide you through creating an account, etc. Just be sure you know what you want everything called, because once you have a name for the main "home" folder, it's tough to change.
It should prompt you to "update" everything, but if it doesn't, it's simple to accomplish through the "System Preferences."
It's kind of fun to know two "languages." While using the internet is really similar on a Windows and a Mac, most other functions are different, not complicated, just different.
It sounds like you are all set with your plans for getting the Mac up and running. And there haven't been many questions I've had that weren't answered in the first page of a Google search.
Good luck, and have fun!