Maybe he did maybe he didn't. What does that prove? Did +John the Forerunner know God is Trinity? Maybe he did maybe he didn't. Honestly, I don't care what Jewish priests did; apples and oranges.
The Apostles most of the time had no clue what Jesus was taking about. If they didn't how could they do things correctly. The evidence from Didache (1st century) shows that the earliest Church used triple immersion while the Apostles were still on earth.
I pretty much agree with that.. Being teenagers as they mostly were.. Jesus mostly spoke in metaphor persona.. and spoke of the "Spirit".. The spirit of the word and of themselves AND of God.. Many christians even to this day miss "the Spirit".. morphing the spirit into some kind of flesh.. like a primate..
ONLY Paul IMO, saw the reality of what Jesus ministered fully.. and maybe Paul missed some things.. The end result of all this, TO ME, is we NEED the Holy SPirit to teach us what we need to be taught of the spirit/SPirit..
Quite a beautiful plan I would say(paraclete).. The spirit is something that must be learned by a human.. Because looking into "mirrors" fools us into thinking WE ARE FLESH..