In addition to rhe other advice, I’d add what helped me the most: install arch from scratch.
Use an older PC you have lying around, or just a VM. Use the installation guide on the arch wiki (or a video on feetube if you prefer to listen to a human explain stuff) and just learn as you go.
How about obsidian.md? It’s based on markdown, so edit mode has lots of keybindings, and there are all sorts of javascript plugins to add functionality.