Some employers offer intellij ultimate subscriptions. It’s even mandatory in some teams. The devs don’t have to pay out of their own pocket. But I think many of them are hooked and will lobby to keep the subscription going.

Try opening a terminal an typing echo 'Hello World!' My two cents: You can forget about Linux for a while. Using a terminal is more important. Here’s a classic guide: https://mywiki.wooledge.org/BashGuide

Cool operating system bro. Does it run KDE?

The tukaani github repos are gone, is there a mirror somewhere?