It’s difficult to change people. Even attempting to do so can be extremely frustrating.
Instead of trying to change people, change the culture and you might find people change as well.
For example, if you want people to be more open in their communication, start by being more open yourself. If you do that others will follow.
If you want people you manage to work harder, start by working harder yourself…be willing to set the example from the top.
The best way to change people is to change the culture and in many cases that starts with you.
Have a great day!