Erlang the language is pretty simple. What takes some grokking is first, the concurrency approach; and second, the OTP library. If you're used to Golang or using Python with threads communicating through Queues, Erlang works about the same way, with the additional feature that a process exiting also kills its parent unless the parent explicitly traps the exit signal. In OTP parlance, a process that traps exit is called a supervisor, since its usual function is to restart the crashed process.
Learn You Some Erlang has some useful discussion of OTP, and it was a big help to me to read through the OTP library source code. That of course will also get you more comfortable with Erlang itself.
Learn You Some Erlang has some useful discussion of OTP, and it was a big help to me to read through the OTP library source code. That of course will also get you more comfortable with Erlang itself.