Great start. Although almost the same and more can be done using tmux - running editor in one split and executing commands in others.

Are there any keyboard shortcuts for navigation between commands/collapsed commands/file or it needs to be done with the mouse?

Ctrl+l toggles focus from command pane to editor pane. There is no shortcut as of now to collapse the command pane.

You have some great student life there. I'm 2nd year, full time CS student + working part time(30h/week) as a developer. My day starts at 6.30am and usualy ends at about 1am working/studying all day.

I could only dream about your schedule.

quite

I was thinking, wow, at university I had classes from 8am to about 4pm 4 days a week (Wednesday afternoons were "free")

Evenings were spent cracking the books and in the computer lab when I needed access to resources I couldn't get over the network.

Still managed to work part time.

Tasks can expand to fill the allotted time, that's true. But, conversely, if you don't have enough time to contemplate and to fail, you often don't chose the best route. You do what's familiar rather than what's correct.