For any “Film Editor” it is important to know the shortcuts. Keyboard shortcuts help in editing any video faster and save time.
Because it is difficult to find spot during editing of any video using mouse. So use shortcuts, it helps in cut, paste, playing backward, playing forward, pausing easily.
There are 150 shortcuts which will save time and edit faster. Shortcut keys help in speed up your workflow.

There are some shortcuts like :-
J K L keys :- These are used for playing backwards, pausing and playing forwards.
If you press these keys a couple of time you’ll get a faster speed in each direction.

CMD :- cmd+Up Arrow &cmd+Down Arrow adjust the volume on a clip by +/- by 1db. Where if use mouse than you have to drag up and down, which is not time efficient.

Alt :- Alt+UpArrow & Alt+DownArrow to move clips between tracks without any use of mouse. Alt+Left & Alt+Right arrow to nudge a clip one frame left or right for precise

So try to practice the editing using different Keyboard shortcuts. It will help in working with any big project. It also improve your skills. Keyboard shortcuts are the best way to speedier editing performance.
So to learn film editing visit :- https://www.filmitacademy.com/film-editing-course.php