Build WhatsApp Lead Automation with Apollo + OpenAI + Google Sheets via n8n

I'm looking for an automation expert to create a workflow in n8n that will:

Fetch leads from Apollo.io API based on filters (e.g. title, industry).
Store the leads in a Google Sheet, avoiding duplicates.
Send personalized WhatsApp messages to each lead via Wassenger API.
Monitor replies and:
Automatically answer using OpenAI when the reply is clear.
Forward replies to my email when the intent is unclear or the lead shows interest.
Update the lead’s status and response in the sheet/database.
Deliverables:

Fully working n8n workflow
Setup instructions
Sheet template

Please apply only if you have prior experience with API integrations, n8n, OpenAI, and WhatsApp automation (Wassenger preferred). This project is for internal marketing automation and will evolve over time, so clean, modular work is important.