Maybe you mastered it better than me but I always found Cinelerra-CV a bit clunky, especially if I was dealing with oddball formats (HDV) that I didn't understand. Maybe I would get the hang of it now but I've kinda moved on.
Clunkiest part was [ and ] - keys, which are not readily available on Nordic keyboard. It has been finally fixed (after 20 years) and you can used < and > - keys instead.