Raspberry Pi 3 B HELP!

Hello! In need of help! I am trying to install Lutris on my Raspberry Pi 3 B Model and it is giving me an error of unable to locate package. First of all, I do not know if this is even possible on a Raspberry Pi. I followed everything correctly and even changed the second code input because of a github support post that had the same issue but it still did not work. Is this a problem with the Raspbian OS not being Ubunto OS? I do not know anything about coding, please help!

This is the script from the command prompt: