[takeAfence]

I second the recommendation for BQN.

You know, there's a reason why there's so many "one-man hobby project" implementations of, say, APL. It's actually not that hard! If you're willing to spend a week (yes, a week), you can have your own barebones implementation of APL. And from there, it's really sort of your playground, which is neat. Thought of a cool idea? Implement it! Obviously, most people won't want to do this, investing time (even if it's not that much) in something they don't really even have any experience invested in. But it's an easier option than you might expect.