Can I use keyboard shortcuts aka hot keys in Eddie?

Yes, in the Legacy WinForms UI (Windows and Linux). The MacOS Cocoa UI does not use this shortcut set.

Full list:

Ctrl + M : Menu
Ctrl + A : About
Ctrl + P : Preferences

Alt + F4 : Exit

Ctrl + Alt + O : Overview
Ctrl + Alt + S : Servers
Ctrl + Alt + C : Countries
Ctrl + Alt + V : Speed
Ctrl + Alt + I : Stats
Ctrl + Alt + L : Logs