Add more help and examples to query-data/get-started

Provide more help in `query-data/get-started`.

A few recent docs-feedback reports for `query-data/get-started`:

docs-feedback
–
Jul 25th
https://influxdata.slack.com/archives/C03HRU09PHA/p1658742600704459
Page: https://docs.influxdata.com/influxdb/v2.0/query-data/get-started/
Feedback: Too little information
–
Jul 18th
https://influxdata.slack.com/archives/C03HRU09PHA/p1658157008756189
Page: https://docs.influxdata.com/influxdb/v2.3/query-data/get-started/
Feedback: i dont know what you mean sry :(
–
Jul 1st
https://influxdata.slack.com/archives/C03HRU09PHA/p1656687003625819
Page: https://docs.influxdata.com/influxdb/v2.3/query-data/get-started/query-influxdb/
Feedback: What is with terminal? Which InfluxDB's Statement is, with InfluxDB2's Statement equal?

##### Relevant URLs

- [query-data/get-started](https://docs.influxdata.com/influxdb/v2.3/query-data/get-started/query-influxdb/)

Start with the query-data/get-started page and review the linked docs-feedback reports and relevant URL. Identify which explanations and examples address the reported confusion about terminal usage and InfluxDB statements; done means the page provides clearer guidance and examples for those points.

Written by the indexing model from the issue text.