Teaching is a very particular skillset and craft, especially teaching languages. It should be grounded in a teacher’s own experience learning something as it helps them to empathize with the learner but simply talking about how you learned something is not teaching.
E.g. the visualization you’re proud of — what problem does it solve for your potential learners? Do they actually have this problem? Not your assumption of the problem but you actually seeing them experiencing this problem and offering them visualization and seeing how it helps them to close the gap? If yes, why do you think your approach failed for HN audience?
If you taught, you know that you and your mind don’t matter much in the process of teaching, your student’s mind is in the center.
Talking about something based on your own experience into an abstract void and hoping that some lurker’s mental model matches yours is not a rigorous pedagogical approach.
I do suggest to experiment with your writing — try writing only about your own journey (and nothing else!), try sitting down with another person, multiple people, and teaching them the same thing. Try writing a post for them and them only after the session and see whether there are any differences.
A good teacher is not the one who proclaims themselves to be one.
Good luck!