Need help with Agentforce Grids creation, credits, and agent connections

Topic: Need guidance on Agentforce Grids creation, credit renewal, and connecting agent responses    

Hi everyone,    

I am exploring Agentforce features and ran into a few blockers while trying to work with grids. My evaluation credits have completely run out, and I want to make sure I understand the full configuration process properly before spinning up a new org.    

Could anyone guide me on the following three points?    

1. How to Create Agentforce Grids: What are the exact step-by-step setup requirements in Agentforce Studio to deploy a functional grid workspace?    
2. How to Renew/Refill Credits: Since my current trial credits are finished, what is the best way to get a fresh allocation of Flex Credits to continue my hands-on learning?    
3. Connecting Agent Responses: How do I successfully pipe or map responses generated by an Agentforce Agent directly into the columns of an Agentforce Grid?    

Any documentation links, step-by-step instructions, or Trailhead module recommendations would be highly appreciated.    

Thank you!