I like keeping computing simple, i’ll give you my example of how i quote/take notes from books. I made a bash script using xclip (wl-clipboard for wayland), this tool does stuff related to your clipboard aka the place things go when you copy them (in linux text goes to your clipboard simply by highlighting/selecting with the mouse). I use my mouse to select a sentence that i liked from a book and press Ctrl+P (in linux you can customize your keybindings easily) and the script just copy pastes it directly to a file using echo command, this way i dont have to open the file write whatever and save the file.