If you can see the police stations marked on your map but you cant go on duty or force duty Follow these steps.

 

Exit GTA 5 and re- go in using rage like you normally would and see if you see this  pop-up while loading into story mode

 

If you do see this but ant go on patrol or force duty i cant help you sorry

 

IF you dont see that pop-up and you cant force duty or go on patrol simply wait for the game to load and exit it.

 

One you did that re-go in with rage and click the settings button.

 

Once you did that it should look like this ( exactly like it did when you first loaded rage pluggin hook )

 

One you see this simply go to game settings  which should look something like this 

 

 

Then click the little arrow under command line switches. 

 

Once you did that you should see a whole lot of options you can check off

 

You will want to check off     Force windowed mode           and          borderless window

 

Then simply click save and launch, then you should get the rage hook pop-up i showed you earlier.

 

 

 

( also one of the pics says console key is F2. It dosent matter but if you didnt change it it should still be console key F4

 

If you're going to make a tutorial, at least make sure you're telling people to do the right thing. Your version of RPH is outdated. Either way, this isn't the right section to post tutorials.