get the hang of (something)
To begin having or acquire a general sense of how to do or use something or how something operates; to become familiar with something. I know it's a little tricky getting the hang of the machine, but just keep practicing and you'll get it. I'm starting to get the hang of how this computer works.
get the hang of
Learn the proper way of doing, using or handling something; acquire the knack of something. For example, I finally got the hang of this computer program. [Colloquial; mid-1800s]