late to the party but: Nim.

Compiled, very good type system, meta programming. Very different from Python while still feeling a lot like Python (and looking like it). Very enjoyable and very rich for learning. Portable and sort of universal (from embedded to front end). A real gem.

I would use this for personal growth since community is small (there are some but very few job opportunity). In particular if you want to try open source, it is probably much easier to have an impact on the ecosystem with Nim than with Python (where a lot has already been built).