Can you also post detailed information how to build these addon for provinces? I am not into this game so a step by step tutorial is appreciated. Then I will see what I can do.
If you want to build one structure you click right on one of your province and you have the differents structures that you could built. Each structure need resources, a technology condition and a specific time. You could built only one structure in one time by province but you could built all structure in all your province (if you have technology and resources of course). When you have choice a structure you valid it with left click. Your structure start to be build and you have an indicator who show you what time left before the construction will be complete (just like for the technology research but the indicator is not at the same place. It is at right and in the middle of the screen and you need to click on one icon to reveal the construction time).