I can see why you want to dual boot, given your use case. For gaming and MS office, Linux is not better than Windows. That said, Linux is fun to learn and you can experiment and gradually move everything over from Windows.
If you want the absolute easiest transition from Windows, I think Linux Mint Cinnamon is the best. It looks like Windows out of the box and is organized similarly. Its like going to a familiar grocery store where you know where to find the things you need. It is stable, there are rarely any weird conflicts or updates that break the system, and it comes with all the codecs you’ll need for media. In terms of installing new software, the software “store” is so simple, it makes installing software much like installing apps on Android (without all the bullshit marketing, of course). Shit just works. Steam, spotify, etc. are right there and install flawlessly. Many Steam games are native Linux and you’ll be able to install the Linux version of any game you own. For Windows-only games, you can gradually experiment with Wine, etc. and see how that works for you.
MS Office is obviously the elephant in the room, but office apps are pretty standardized at this point. You can use MS 365 online apps. Or, it is an easy transition from Word, Excel and Powerpoint to LibreOffice. Much more intuitive than using Google apps, for example. Write a few papers in LibreOffice and just save in Word format for submission (although most profs will accept Open Document Format as well, which is also supported by MS Office). Double-check formatting in Windows or the online Office 365 apps if you are worried. It is pretty easy to get used to if you use Office like most people do.
But don’t take my word for it. Make a bootable live usb and see for yourself. …readthedocs.io/…/latest/