Send labeled email to a Notion database

This workflow sends the contents of an email to a Notion database. The email must be labeled with a specific label for the workflow to trigger. The email subject will be the title of the Notion page, and a snippet of the email body will be the content of the Notion page. The email link will be added to the Notion page as a property. Prerequisites Notion account and Notion credentials. Google account and Google credentials. How it works On scheduled intervals, find all emails with a specific label. For each email, check if the email already exists in the Notion database. If it does not exist, create a new page in the Notion database, otherwise do nothing. When the task in the Notion database

Help me set up the n8n workflow "Send labeled email to a Notion database" (https://n8n.io/workflows/1939). It uses: HTTP Request, Gmail, Notion. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.