Debian with KDE works great for my needs.

Thanks for your input! I think, to make it as easy as possible, I’ll first go with the most windows-like experience (KDE).

Nice to hear, that privacy is less of a problem with linux!

1. I’m using a “middle-class gaming tower” I think. (NVIDIA GeForce GTX 1060 6GB VRAM, 16 GB RAM, AMD Ryzen 5 2400G).
2. Isn’t fresher always better?
3. I already found out, that it’s possible to change the desktop environment, which is great I guess. So I think at first, I’d like to maybe stick to the “windows-style”.

Thanks for your extensive reply! I will definitely keep that in mind!