Switching to Zsh as default

After installing KaOS, I always try to switch to my preferred shell of late, zsh. However, it doesn't work.

Now, when I start Konsole, I get a cursor blinking without a prompt and basically not responding to anything.

Has anyone done this and how did you solve it?

plaken It comes a bit late, but I always prefer to simply call exec zsh (or exec fish, etc) on the top of my bashrc.