Hi there,
This is Kartik. I have been working with Docker and Kubernetes since 2018. I am currently working as a Cloud Migration engineer and deal with microservices, containers and cloud on a daily basis. Additionally I am a Certified Kubernetes Application Developer and have provided training for certification exams to people.
I think 2-3 hrs are enough to understand the theory and 6-8 hrs for practicals at minimum as time will also be needed for setting up environment. In the end it can be completed in a weekend.
Feel free to reach me!!
Thanks & Regards
Kartik Sharma