Yeah this is how I practiced Postgres hot standby and read replicas,

It was also how I learned to setup a Hadoop cluster, and a Cassandra cluster (this was 10 years ago when these technologies were hot)

Having knowledge of these systems and being able to talk about how I set them up and simulated recovery directly got me jobs that 2x and then 3x my salary, I would highly recommend all medium skilled developers setup systems like this and get practicing if you want to get up into the next level