Baofeng UV-5R Help Programing

To W5LZ…I am not aging any luck putting in my local police, fire , highway frequencies to listen to.
I need to be able to scan them on one channel I believe. When I follow all directions and it says hit “scan” for 2 seconds to go to “range” all it does is scan. I also need to know how to get rid of preprogrammed frequencies. Just need step by step …thank you