Push JSON data into an App or to Spreadsheet file

This workflow template shows how to load JSON data into a workflow and push that data into an App or convert it into a Spreadsheet file. Specifically, this workflow shows how to make a generic API request that returns JSON. It then shows how to load that into a Google Sheets spreadsheet, or convert it to .CSV file format. However, you can use the general pattern to load data into any app or convert to any spreadsheet file format (such as .xlsx).

Help me set up the n8n workflow "Push JSON data into an App or to Spreadsheet file" (https://n8n.io/workflows/1933). It uses: Google Sheets, HTTP Request. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.