Kleppmann will not help you in real life situations, it's a textbook that you might read to understand what are the things you don't have to/need to worry about.
We teach the difficult part at the Academy in a cloud agnostic fashion so you don't necessary have to suck up their marketing driven certis.
We don't see any new projects starting out with Airflow, Beam, Storm or Hadoop, so that's not a good choice for anyone, only if your plan is to keep horrible legacy stacks alive as a freelancer.
"Since we chose the path of virtualization and containerization we've allowed the multi-tenancy facilities in Unix to atrophy and it would take a little bit of work to bring them back into form."