I'm looking for a comprehensive learning resource that covers everything from the basics to advanced topics. I've already watched all the video lectures on the ManyChat YouTube channel and completed the free course available on the ManyChat website. I've gained a lot from these resources.

Now, I'm seeking guidance on more advanced topics, such as how to effectively engage with clients, the prerequisites for offering ManyChat services to clients, how to advise clients on chatbot development costs and monthly subscription fees, and any other information that would demonstrate my thorough understanding of ManyChat and my ability to meet client needs.

Could you please provide recommendations or a step-by-step guide on these topics? I would greatly appreciate your assistance.