Why would you, potentially new user, want to use linux? This is intended as a one off for newbies. I'd mostly like this to be an "What about this that and the other" and general newbie question thread if you more experienced users don't mind.
Linux is an amazing thing. My take on it is if something breaks in windows, you're fucked. You cannot fix it you just have to reinstall. In some cases you can fix things (like if a random space goes missing you can readdress it in disk management), but in my experience I haven't been able to fix anything. So I use linux as my main desktop.
Now what a lot of users ask on here is "but can I gam?" Yes you can user! Steam holds a lot of games that you can play. And if you don't want to use steam, have a hand at wine and play non-native games! I'm sure you'll do fine :P Theres a lot of reasons to use linux, not only to play games, but to have over all control of your system and learn how it works.
With gaming, people also ask about linux even running on their hardware. "What GPU should I have? Is this CPU good? How much hard drive space?" If you have an AMD GPU you'll be fine, but nvidia cards are good too! If you have a pentium 4 or an i7 4770K your system will be smooth as butter no matter what (depending on the system of course). It used to be a problem of drivers didn't work for everything out of the box. This is not the case anymore as a lot of hardware works now. Even the PS4 :P
"So... But what system should I use? Is Red Hat good? My grampa used it... Someone told me Arch was bad and that I should use gentoo?"
Honestly, starting out, you should use ubuntu mate. I say that because it is a simple system with few crashes compared to normal ubuntu, and the system is easy to learn on. Gentoo and Arch, pure, are not good systems to start on in my opinion. I am an archer myself, but I am also very comfortable with the command line. Arch and Gentoo are built from scratch and there is a learning curve.
"But I don't wanna use CLI!!! Is spoopy!"
No worries! Very rarely do you even need to. In ubuntu you get what is basically the app store to predate apple. You can also download packages off the net to use and install!
"But what about all my windows software! I need this one and this one and this one and this one and this one and...."
Look I get it. We all do. You have a really, REALLY, REALLY, lot of shit that you have used since you were 5 and running XP (or dos), but there are many things that are probably better than what you have access to now. If you are a video editor try out KDenLive, Lightworks, or DaVinci resolve! If you write a lot I recommend WPS Office or LibreOffice! You also have access to the google software if none of the office stuff works for you. Browser? Trust me you DON'T need internet explorer. Chorme, vivaldi, firefox, we got it. Plenty of torrent apps, plenty of anything you need. Might need a little research in that but you will find your way.
"Why does Ubuntu Mate look differente from Kubuntu / Why dosen't it look like windows?"
I recommend Mate because its extremely customizeable and is a good way to get your feet wet in Desktop Environments. Ubuntu Mate uses Mate as its desktop environment. Ubuntu uses unity. Kubuntu uses KDE. Some other DE's are:
KDE-Neon
AmiWM
PekWM
OpenBox
XFCE
Budgie
Gnome
There are MANY MANY MANY DE's all that are pretty easy to customize to your liking.
"But what if it breaks?"
Ask here! There are plenty of linux users around we can probably help you fix it.
That all being said, I hope you have questions or are ready to take the leap into linux to see what happens. If you don't want to commit completely, get a VM app like VirtualBox and try it out in there. Have fun with it!