Get off to a flying start
Definition 1 of 1
Pro Tip 1/3Positive Implication
Implies an enthusiastic, strong start; often signals a hopeful outlook for what's coming. 
Her speech got off to a flying start and captivated the audience immediately.
Pro Tip 2/3Not Literal
The phrase is figurative; it doesn't mean starting with actual flying but rather quickly and effectively. 
Martha's fundraiser got off to a flying start, with donations pouring in on the first day.
Pro Tip 3/3Action-Oriented
Used when the start involves action or a significant step, not just a passive or quiet beginning. 
The sales campaign got off to a flying start, breaking records within hours.