Beginning in the 18.7 release of SQL Server Management Studio, Azure Data Studio is installed alongside SSMS automatically.
F5 - Execute (query in query window)
F6 - Toggle between Query and Results panes
CTRL+1 - Run sp_who
CTRL+2 - Run sp_lock
ALF+F1 - Run sp_help
Shift-Alt-Enter - Toggle Fullscreen
Ctrl+L - Display the estimated execution plan
Ctrl+Shift+Alt+L - Display the estimated execution plan