How to track Matomo usages?

My need is to understand how much is used the Matomo interface and the evolution of this usage.

We have two Matomo, so my idea is to add a tracking code in the other Matomo, and also the same for the second with the first…

Is it possible ? How is possible ? With a custom template or plugin ? ou a plugin which allow me to add a custom tracking code ?

Thanks for your answer

Hi @OlivierClausse
Here is the plugins you could need: