And the winner is:
I have fought my way through Perch, October, ProcessWire, Wordpress and not getting very far. They all have 2 major drawbacks for me:
That is strange because I like a good interface (remember Macaw, ha?). But there was a lot of hover states and fly-out menus and stuff going on while necessarily clicking back and forth and switching between a backend and pages and files (October). Wordpress was just overkill with its options and menu items. Also, you obviously can't use SVG in Wordpress without a plugin. PW was nice, but it made me nervous.
Also, installing a database with MySQL locally was prone to fail. While this was probably mostly my fault, it was almost always weird and complicated with all those database names and passwords and hosts. Only Wordpress was easy and quick to install.
October CMS appeared really cool to me, with a built in editor and some starter things to install to help you get of the ground, but if you follow their advice to delete the installation files after installing it, it breaks the database if you work locally. That sucked big time.
So, I all that was left for me to do, was try Kirby. No MySQL, just folders. Easy to install with a nice starter kit. But then you have to get into learning PHP very soon. That is kind of a bummer, but on the other hand, you have to learn that anyway if you decide for any CMS, right?
And then there is the excellent 1a+++ support from the Kirby team on their forum. While the people from Perch advertise their support as being part of the price and give talks about it on conferences, the support you get from the Kirby people on their forum is worth a wow. And they don't even advertise that at all. Its fast, competent, they correct your code and even sprinkle everything with a little bit of humor. Which is surprising since they`re all german, but things can change obviously.
Kirbys backend (the Panel) is really an excellent peace of interface design. Very clean, very nice, no fuzz, almost modest. It could have some more features but that might come over time.
Now, this is just the opinion of a dilettante and I don't know where I will end with a CMS later, but for now I stick with Kirby.
So, thank you @luxlogica and maybe see you there;)