Keep an eye on gleam lang if you’re not already. It’s a language with an ML inspired type system (like rust) that compiles to erlang. It is likely too nascent to be used in production (in terms of tooling, ecosystem, stability, etc).
To be honest... I am more likely to learn Golang more deeply (I know it quite well already but haven't, like, programmed in it in production for a long time, I am mostly using it for my own scripting and personal project needs) or even dive into OCaml now that it has a multithreaded runtime.
I do like how enthusiastically people make new languages but IMO most of them should be absorbed back into the hivemind at one point. This huge fragmentation does not help anything (except maybe teach you a technique or two which is of course very valuable by itself).
And figuring out the gap between "wanting to tinker" and "being a reliable paid professional" is a big struggle that takes a while to figure out -- and maybe takes your entire life in maintaining a good balance between both.