Is there a way to rename a planet actually?

Had the same question yesterday. The tutorial 1 is not playable since you need to rename a fleet by clicken both mouse buttons, which I couldn't manage with a trackpad. Maybe it is possible with something like Automator and a hotkey but didn't look into it yet.

Found a solution (macOs 12.6 on MBP 2020 M1):

1- Go to System Preferences / Accessibility / Pointer Control / Alternative Control Methods
2- Check "Enable alternative pointer actions" (For me right click is bound to F12)
3- In-game: hover with the mouse over the fleet box (or wherever you need to click both mouse buttons)
4- With left index finger: click the touchpad with one finger and hold the click
5- Now also press fn with left little finger and F12 with right hand (fn enables the F-keys row on the touchbar)
6- Rename your fleet, planet, etc..

Enjoy!