I had a similar question. I decided to learn Erlang / Elixir first. Starting with Elixir and thought that I should probably learn Erlang first since it's going to come up. I actually like Erlang a lot and use it as much as I can. There are use-cases where Elixir is more suitable, e.g. web development using the amazing Phoenix Framework.

Anyway, I found myself doing REPL development using both Erlang and Elixir. Many of the benefits that I read about CL seem to exist within these languages as well.

I hope to explore CL eventually, but I'm just having too much fun with Erlang / Elixir at the moment.