Welcome to Devtalk Duncan 
@Margaret if you see this, @oubiwann is a core team member of the LFE programming language, which, like Elixir and Erlang and Gleam, runs on the Erlang VM. It was created by @rvirding, who is also one of the creators of Erlang. I reckon a PragProg book on LFE with Duncan and Robert could become the de facto LFE book 
Nice! I keep meaning to do a music theory course but never seen to get around to it. Have you composed any tracks? You’ll have to post them here (Or in our What are you listening to? thread!)