Wanting to improve my Linux skills after 17 months of daily driving Linux

I’ve been daily driving Linux for 17 months now (currently on Linux Mint). I have got very comfortable with basic commands and many just works distros (such as Linux Mint, or Pop!_OS) with apt as the package manager. I’ve tried Debian as a distro to try to challenge myself, but have always ran into issues. On my PC, I could...