TLDR: I want to be able to set specific window sizes and positions of the current window with hotkeys, as well as focus on specific apps with hotkeys.
I've made posts like this elsewhere as I've lately been really trying to figure out Linux. Anyway, right now KDE is very appealing since its very customizable and has a plugin to recreate Window 11's Mica effect.
First, I want an alternative to Rectangle Pro app on Mac, which let's you set many hotketys for changing the current window's size & position: like use up the left or right halves or thirds of the screen, or corners and taking up a quarter of the screen. You can also make custom window layouts and bind those to keys. I've been told to use a WM like Sway, but then I'd have to make my own DE from scratch.
Second, I want to focus on specifc apps with hotkeys. For instance, I'd want to press CTRL Shift Z to switch specifically to Zen Browser or open it if it isn't opened, and CTRL Shift O to open or switch to Obsidian. I only found two solutions for Linux (wmctrl and wlrctl), and none for KDE.