Wiktionary
hit the ground running
vb. (context idiomatic English) To begin an activity immediately and with full commitment.
Usage examples of "hit the ground running".
A level of response of that difficulty requires everything to hit the ground running perfectly.
I twisted the van into a narrow street, beaked to a stop and hit the ground running.
We've only got two months to complete the assembly and training of our forces, so we're all going to have to hit the ground running, but I have complete faith in our people's ability to pull the op together and carry it through successfully.
Like soldiers jumping into their drop zone from a hovering helicopter, you want to hit the ground running.
At the same time, the unseen force holding him abruptly faded, and he hit the ground running.