Moksha is not freedom from action but freedom in action.
Get freedom from bondage from birth and death
I react and leaves behind karma phalas and vasanas
Freedom from vasanas, karma phalas
Karma yoga gives you the opportunity to catharise your vasanas - the freedom to get out of the repetitive chain of desire - action - reaction.
When such a mind becomes calm, there comes an efficiency.
And you do the action and dont become bound.
The entire Geeta Marathon by Swami Swaroopananda can be caught at https://clix.chinmayamission.com/product/geeta-marathon/