Modular & Customizable AI-Powered Email Routing: Text Classifier for eCommerce

How It Works Form Submission: The workflow starts with the On form submission node, which triggers when a user submits a contact form. The form collects the user's name, email, and message. Text Classification: The Text Classifier node uses an AI model (GPT-4) to classify the submitted message into one of the predefined categories: Request Quote: For quote requests. Product info: For general product inquiries. General problem: For issues or problems related to products. Order: For questions about placed orders. Other: For any messages that don’t fit the above categories. Email Routing: Based on the classification, the workflow routes the message to the appropriate department via email: Prod.

Help me set up the n8n workflow "Modular & Customizable AI-Powered Email Routing: Text Classifier for eCommerce" (https://n8n.io/workflows/2851). It uses: Send Email, Google Sheets, OpenAI Chat Model, Text Classifier. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.