Get Entity Metadata from JS / Odata feed

Hi All,

Need Help.

I have to Create a Power BI Report Template to show the Entire D365 Online Metadata. Like,

1. Number Plugins Registered at Each Steps,

2. Total Number of Attributes/Entity.

3, Performance related Metrics.

4. Javascripts loaded on Save, On Change and On Load an son on.

All this info I have to retrieve from Dynamics 365 CE Online. Let me know the best possible suggested path to do so.

Please Help on it,.