Get a handle on - Idioms by The Free Dictionary
get a handle on
get a handle on (something)
To have a firm, clear understanding or determination of something. Go down to the circuit breaker and see if you can get a handle on what's causing the power outages. I'd gotten a pretty good handle on the concept after spending an hour with the tutor.
References in periodicals archive
What it tells people is that the city has failed for decades to get a handle on
the gangs and the cultural and economic forces that perpetuate them.
There are some best practices that can help you get a handle on
this fast growing and changing technology.