Pumping at work?

Ka

Can someone explain how pumping at work works? I hate to admit it but I’m too embarrassed to ask someone at work, being that I work with mostly men and I just started at my job a few months ago. I know my job has a lactation room but I’m just wondering what all I need to bring and how everything will be stored. Do they supply a pump or do I need to bring my own? Where is everything stored? How many times a day do you have to set aside to pump?