I want to do a POC on NLP (Natural Language Processer - R language ) with Power BI

HI 

I want to do a POC on NLP (Natural Language Processer - R language ) with Power BI, how to start and where to start.

any tutorials will be higly appreciable.

R with creating data source as Power bi

R with a visual creation in Power BI 

need help for the tutorials of any thing from NLP in Power BI .

Thanks,