EVE Installing

When I had to buy a new laptop it came with W10, and Linux was the natural antivirus system to adopt. Over a decade of solely using Windows has limited my technical skills (To HTML and basic JS), so I am currently only able to do Linux stuff if I can name and google it.
Which was why I was delighted that Eve Uni has a guide!

However, after getting through the guide I found two issues. First, Terminal seems to encounter an error when installing (Though as you can see, I followed the EveU guide without noticing at first) and when I wanted to check whether the installer worked at all, I realised that the launcher opens fine, but when I try to launch the game itself, it doesn’t work.
Is this a common issue with a guide to solve? What steps can I do to troubleshoot, and what would you fine people need to know to assist?