Provide more concrete examples

As a newcomer to InfluxDB and Flux I find it best to learn from mini tutorials which cover the topic from start to finish.
There is just too many assumptions and abstractions.

For example this page [query influx] explains about querying data but the content is irrelevant to what is provided in [write csv] section therefore reader is unable to go through the entire life-cycle because once we wrote the weather data and sudently query CPU information.

**Suggestion**

Instead
```
Define your data source
Flux’s from() function defines an InfluxDB data source. It requires a bucket parameter. The following examples use example-bucket as the bucket name.
```
Provide a concrete example of loading a dataset into an `example-bucket` and then you can query data that reader can "touch"

##### Relevant URLs
- [query influx]
- [write csv]

[query influx]: https://docs.influxdata.com/influxdb/v2.0/query-data/get-started/query-influxdb/
[write csv]: https://docs.influxdata.com/influxdb/v2.0/write-data/developer-tools/csv/