1. to learn the ropes
Before you start you have to learn the ropes.
I am doing my best to learn the ropes.
2. find your feet
Did it take you long to find your feet when you started your new job?
find your feet: adjusting to a new place or situation
3. to implement
It is not easy to implement new directives.
to implement the policy of fighting crime
to implement a new product to the market
We may not have enough money to implement our plan.
to implement changes/decisions/policies/reforms