Probably better to put it in a Linux meme community.

That seems relatively straight forward:

sudo add-apt-repository ppa:kisak/kisak-mesa
sudo apt update
sudo apt upgrade

The first line adds a repository source, where the mesa packages can be downloaded from via apt.
The other lines just update all repository data and upgrade.

Then go to the command line and do

history | grep "apt"

This will list all commands that include “apt”, that you ever executed.