How to Implement Cloud Agnostic Architecture for My Business?

I recently came across an intriguing article about the benefits and best practices of building a cloud agnostic architecture. The article highlights the importance of developing applications that can run on any cloud platform without significant changes to their architecture or code. This seems particularly relevant in today's context, where enterprises increasingly rely on cloud technologies and need to avoid being locked into a single cloud service provider.

I have a few questions about implementing this approach into my business. Specifically, what specific steps and technologies should be used to create a cloud agnostic architecture? What are the main challenges and risks associated with moving to such an architecture, and how can they best be mitigated?

Additionally, what best practices and tools would you recommend to companies looking to implement cloud-agnostic infrastructure? Any advice or real-life examples would be greatly appreciated.

For those who are interested in details, I have attached the link

Thanks in advance for your help and ideas!