Need Some Total Noob Advice for Installing and Running Linux

Alright, peeps, I want to build Linux on my new PC and need some help with that. On my old PC, I had kubuntu installed, which I liked (at least until downloading Skype fried most of my installers and rebuffed all attempts at deinstallation). When installing kubuntu, I had a lot of help (and by a lot, I mean my friend did like 90% of the work) but as I don't see them quite as often and I would like to be a little more self-sufficient this time around, I implore thee, Linux users of Hexbear. So here are some general questions:

1. Which distribution is right for me?

I have some experience with MINT and kubuntu. I really liked the KDE environment of kubuntu and generally preferred it to MINT. My friend uses archlinux, but they also warned me that arch requires a bit of expertise and isn't necessarily user firendly. It looked really cool, though. I am willing to learn, but I generally suck with computers. I will mostly use my PC for basic programming tasks and data analysis (mostly python using jupyter, but I would like to learn some basics in C++), similar work related tasks (using TeX-Studio, the pdf editing functions of programs like okular, Libre office on rare occasions etc.) and the occasional Minecraft session.

2. Where can I find useful resources for learning about a given distribution?

Keep in mind that I suck absolute shit at computers. I know how to access/use the basic functions of the terminal and how to superficially navigate the PC, but anything beyond that is magic to me.

3. Y'all got any good wallpapers?

A FALGSC themed wallpaper that doesn't burn your eyes out due to being perdominantly red would be cool.