If you're writing a Beginners guide, please follow best practices! Running software as root is bad terrible practice! Read Why Not to Use Root User? or any of the countless other websites that tell you not to do this. Use sudo apt install when needed, but don't give higher permissions than necessary to anything running on your system. Linux is a multi-user system, learn to use it to your advantage.

Easy solution: create a new user "for instance lightning", and install everything from there. Install in /home/lightning, and don't give root access to anything that doesn't need it.