Amplitude: Answer Initial Questions for Notebooks and UI

We have a list of initial questions that we would like to answer via Amplitude. These questions will be answered by one or more tools with in Amplitude and, in some cases, updates to our eventing where needed.

We should break out each question to determine if any new events or tooling need to be added and break out the report / deliverable in Amplitude.

The original list of questions originates in #3668.

## Questions We Will Answer

### Overall UI

#### In query builder how many people stay and interact with query builder vs those that jump into script editor in their query building flow?
#### Follow up questions
- How do we determine the user is "done" interacting in query builder to measure the flip to script editor?
#### Measurement Assumptions
- We will only capture users who interact with the query builder AND interacted with script editor.

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#### What does a user do when they first login, where do they go? Can we segment this by first login and returning logins?
#### Measurement Assumptions
- Currently, all users land on the homepage when they login. We would want to filter that step out (at least for now) and report on behavior after that page load.

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#### How often is a query generated with Query Builder returning no results? How often does a user follow that by an increase in time range that is then rerun?
#### Follow up questions
- What does it mean to have "no results"? Is it an error, timeout or empty dataset?
- Can we expand on the overall goal of this measurement?

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### Notebooks

#### Where do users fall off between generating a notebook from a task template? When / if they actually a task, what do they do immediately after?