I thought you were doing okay up until this part. “Literal” appears in some poorly written articles. “Physical” appears, I'd venture, nowhere in serious discussions of the Eucharist — except in discussions of extraordinary miracles.
Why don't you confine yourself to the terms we DO use, “real” and “substantial”?
As long as you use “literally” and “physically” you are not presenting Catholic teaching. And if you do so after advice, then your ignorance is culpable and your act, being the presentation as known truth of something you do not know to be true, becomes a lie, a serious sin.
in fact, you are adding bearing of false witness to the sin of apostasy. Leave us, if you must. But don't carelessly spread lies about us. That's not fair to your hearers.
I think your suggestion of discussing Ignorance—Invincible and Vincible - is a good one.