Top left
left and right arrow buttons to go up or down (if you’re in views 2 or 3, not sure about the others)
being able to set up the display to see long file names,
Click and drag the column heading boxes in view 2; drag the handle at the bottom-right of each pane in view 3
and having several windows open at once.
Cmd-N opens as many windows as you want.
Spacebar previews a file without opening it; cmd-i shows details for the file…it’s minimal more in appearance than in functionality, I think, once you get the hang of it. I’m sure there are instructions somewhere on the Google.