Dez, First, a most hearty
to TS and the world of Mac. Yeah, there will be some adjustments, but no doubt you will soon catch on. There are several PC converts and closet PC users about (I am not one of them) who can help when the need arises, so be at home and post away with all your questions. That is why we are here. And please, we take great pride in our credo that there are no dumb questions. Really!
But to your issue at hand. One approach is to go to System Preferences/Accounts and then create a new User for each of the 8 Mac users (but do not grant them Administrator privileges). That way, they cannot add or delete programs (applications) without your permission. They must log in with their name and password and unless you change things, they only have access to what you give them.
HTH
Harv