That would be step one out of the first three that I bother with :).
Do you have good resources for learning Elixir with OTP and Phoenix ? I also believe LiveView can deliver the 80% of functionalities for 20% of the price, so I'm very interested in learning it
"Programming Elixir" and "Designing Elixir Systems with OTP" are also good, the former more so if you get started. From what I remember "Programming Phoenix" was enough to get started though, and these two books are better at getting deeper knowledge of Elixir/OTP.