Looking to start automation Agency but have no clue on what to offer to customers?

I am proficient in various automation tools such as n8n , make.com , automation anywhere power automate. So thinking to start a Automation agency in 🇮🇳 india. Could you guys answer this questions:

1. Did anyone start before? 2.what hurdles do we face in between?
2. What sector do we need to focus on?
3. How much to expect from one single lead and how to find leads?