[make] {one's} mind

to reach a decision or come to a conclusion after careful consideration and thought

After much deliberation, he finally made his mind and decided to accept the job offer.
The team had to make their minds quickly about the project's direction.
I need more time to make my mind about whether to pursue a master's degree.
The team had to make their minds quickly during the emergency to decide on the best course of action.
She couldn't make her mind about which vacation destination to choose for the summer.