You're under no obligation to update, and will likely find that if all you do is surf, email and listen to music, you need never touch a thing. I would recommend that you peruse the software repository, however. You may find a browser or music manager you prefer to the defaults.
I think this is a very relevant comment that is often over looked. Linux is, by comparison to the proprietary world, very fast moving. The last Windows release was what, 5 years ago? Mint, as an example, is about every 6 months. Some of the Debian flavors upgrade every few weeks.
First lets think about why we upgrade. To gain new functionality that we want/need would be one reason. Because the distro we are using is no longer being supported, therefore no more security updates and bug fixes, would be another. Enhanced ease of use would be another. To see and stay on the cutting edge of new technology would be another. I am sure there are others but these cover the vast majority of reasons for upgrading.
Now look at your situation. The functions you use the computer for are quite mature, so you won't be getting any new functionality that normal updates wouldn't already bring you. You are using the latest version now so there will be full support for it for quite a while. Being a new user, your time would be much better spent learning more about what you have than trying to upgrade. When you do need to upgrade you will be much better informed about how you might want to structure you system for your needs. If your system is adequately meeting your needs today, it will do so tomorrow, regardless of whether there is a new version available or not. As a new user, do you really want to be on the cutting edge of technology. Remember, time tested, mature solutions are always less buggy, and more reliable, than the latest bling to hit the net.
Spend your time learning about /etc/fstab and partition mounting, Grub, partitioning, system layout, etc. and you will be much better off in the long run.
I don't have a clue how your system is now structured, but the only thing I would suggest at this point is to make sure you keep your personal data on a separate partition from the system itself. The rest of your first adventure into Linux is going to be a learning experience that you probably will not want to keep after a few months of learning anyway.
Good luck and there are a lot of people here that are willing to help you through this transition period. If you are willing to put forth the effort you will be free of Microsoft's bullying, manipulative ways forever.