The dashboard fills out as you do more with the site.
It needs data to populate.
You can add reports as you go.
The templates are pretyty powerful, the details are also pretty granular.
We won't go into details, but we'll look at data exporting
Data Studio is your first point data output.
Create a report
same here as tag/analytics
Connect data soource.
There's a lot of good options here, but for SEO you want Analytics.
Authorise, it's google in google, so fine.
the account and property you are working with
There's is a metric ton of stuff you can add for reporting.
For simplicity sake, close the blank report it opens when you connect the data source.
Go back to the data studio home and click templates.
It gives a good selection of templates that will pull data from your analytics source.