Rock on mate - I came from the same place 40 years ago. But. no language is ever complete for me unless I canz Space Invader. I guess your now onto lisp? Do the Space Invader first in your Forth.
Chuck is a god.
I found out about Lisp a year before Forth! Working through SICP, watching the lectures and of course writing lots of Scheme programs have really helped me improve.
But it's weird. It's almost never useful at implementation. It's like Chuck and the guy from TLA+ say. The important thing is just asking THE question. Props to ADA Lovelace for basically inventing that.