Just passed SAA a few months ago and SOA recently.

I see most Cloud Engineer jobs are looking for the following:

Cloudformation or Terraform

Container Orchestration (Ecs/Docker/K8)

Please help me understand:

K8, I want to learn it but have no idea on how to approach. Thank you. 1.

Whats the best material to master this? Is there a book, video course or guide that helped you?

I am having the hardest time approaching K8 because I come from a Network Engineering & Sys Admin background. Ive never dealt with applications directly or any type of orchestration. Any good material? Especially books?