Hi.
If i recall correctly there was minimal stats in alfresco admin screen but no a easy way or addon for your needs.
If you are using Alfresco Content App or digital workspace for me the easiest way would be to define a set of queries and launch the search in a custom component. All the points that you specify can be easily translate to an afts query. Then make a module and use your angular chart visualization library of preference.
You can do the same in share, extends share as in the examples then in the controller use the apropiate methods to launch a search and display the results in aca/share or load that json in any graph tool
Alternatively you could check dockers like grafana to extract stats but i think is harder, the query aproximation should be more simple and quick.
Also if you want to avoid extra overwhelming and make it more efficient you can use a cronjob to launch the queries and generate a json report, then use that report to display your stats. This can save you a lot of time specially for some of the queries (user+site queries).
