Others have already answered your questions, so I'll just drop in my anecdotal experience to moving over my desktop to Linux last year. I tried a few different distros but settled with Fedora KDE edition. It works with everything exotic in my laptop out of the box, except for the gyro that doesn't work with anybody else either. The desktop feels familiar and is easy to customize. I tried to like Gnome and variants but it is really settled on The Gnome Way of doing everything. Fedora is a fresh experience from previous attempts of going full Linux desktop with Ubuntu and even Mint. The GUI for software and package management is neat and includes native packages, flatpak both the fedora builds and mainline. Some minor things are not quite there but I believe that will be the Linux experience forever and I'm okay with it. I recommend to try it.

There is no right answer. There are many distros to choose from and each has its pros and cons. My suggestion would be to try a few things in VMs before fully making the jump. Personally I use Mint. It just works and takes a minimal amount of hassle to install and run. If that's a priority to you, I'd suggest checking it out.

I don’t have anything to say that everyone else hasn’t so I’ll just wish you good luck and hope you have an enjoyable experience

So I don't really have experience with the gaming aspect as I pretty much get what I want from a steamdeck. I think its likely you would want to go with one of those (a gaming setup someone else suggests) or dual boot to have your gaming system and your doing other things setup. Just in case I will mention the one I use called zorin. It is based on ubuntu with gnome and its main claim to fame is its an out of the box distro that tries to emulate windows (other systems to but the paid for version unlocks that. its default is a general windows type experience). Out of the box means it has foss office, video file viewing, audio file listening, image file viewer, browser of course, rdp client, mail client, calendar, contacts, also image,video,audio file creation and editing, optical disk copier/image creator, wine with play on linux so that you can right click a windows executable and run it and such. It does non free software things like nvidia drivers right off the bat. Its great for an install and get going right away type of thing. Its always a bit out of date because its emphasis is stable, just works, get going type of thing. I have a few complaints. Mainly it does not have the windows key, right arrow thing to half screen by default. It could be a stability thing that they don't want to mess with the compiz or whatnot. Then the other thing is I find the software gui interface it have an aweful search for getting more software so either just use apt at the command line or download the .deb installation file which things like various browsers have as a linux option for download and then its really just like adding one to windows or mac. download and run the installation.

try a bunch in live usbs and see for yourself

I like plasma kde but I dont think most vnc clients support it so remote desktop with a viewer seems out, rustdesk works but you have to manually accept the connection at the computer. Which works for me since I only remote desktop when moving to another room or going to the bathroom and I need to monitor something.

Im using cachy, I had to manually partition with gparted once in the install screen after using the usb since auto didnt work but the most recent cachyos dualboot yt video can walk you through that, I can find that for you if you need it, I used ventoy since I wanted to keep using my usb for data.

Look up linux desktop environments, that more decides the look, disto decides how and where you get packages, what kind you can install, etc. Like cachyos I use pacman or paru to get packages, elsewhere youd use something else and theyd pull from a different repo.