All the options you listed are downstream from a company. Fedora is from red hat, mint is a fork of Ubuntu, open suse is from... Suse? I can't remember. That's not necessarily a bad thing but figured I'd mention it.
Any distro you choose can look however you want. This is something I didn't understand at first. Your version of Linux lives below the desktop environment. You can install (almost) whatever desktop environment you want on top of your version. Then you can tweak your desktop however you want. Some distros come pre-tweaked but don't pick a distro on looks alone.
So really your deciding between 3 base Linux distros. Most "distros" are just the base system with some choice drivers and software to help you get going. A few of them are tweaking at the kernel level. You can do the raw version of any of the base Linux versions if you prefer to control and limit any software on your system.
Debian - updates slowly but stable, focus on testing before stable releases. You might miss new Linux features but unless you're running the latest hardware you probably won't know the difference. Distros based on Debian: Ubuntu, mint, popos, elementary os (looks like macos!), a hundred other ones.
Arch - updates rapidly with the risk of something not working. If you want bleeding edge features or every drop of performance choose an Arch distro. Just know that you MIGHT need to help it along. I don't think arch distros being difficult is as true as it once was. There are some excellent distros out there making arch accessible and easy for the masses. Notable distros based on arch: endeavor, cachyos (my personal favorite right now), omarchy
Fedora: kind of a mix giving you fairly up to date software with a stable system. Honestly it's probably the best place for a newbie to start. It's not perfect though and you'll want to read up on install if you have a Nvidia card. Fedora based distros: nobara, bazzite, but most people just use vanilla fedora.














I don't think you'll get the results you are hoping for. I'm not sure it would harm it but you'd need some sort of agitation or scrubbing to actually get it clean. I'd propose a soft toothbrush and iso. Or if you're dedicated to dunking it, maybe try one of those ultrasonic tubs