Json data - not able to query

Hello,

I am new to Grafana…that said,

I installed Grafana
I installed the Simple JSON plugin
I created a JSON data source connect with a sample file from this site
https://github.com/bergquist/fake-simple-json-datasource/blob/7a32a03f2306e5eb816393390c69cdf770584b66/series.json

Now how can I query the data - when I try to build a query - I dont get any fields in the dropdown.

Am I missing something here…
Is there anything else to install for API’s or something or am I doing something wrong!

Would appreciate any input - Thx