stay in the dark
To remain ignorant of or uninformed about something. I always stayed in the dark about our finances when we were married, so I found it really difficult to manage money after we were divorced. The boss makes a point of staying in the dark about some of our…less legal activities. I know politics can seem really boring, but if you stay in the dark your whole life, you'll never have any say in the way the country is run.
stay in the dark
(about someone or something) Go to in the dark (about someone or something).