I'm a technophile, been in IT 30+ years now, wrote my first programs in Fortran on punched cards.
I had these same questions, and had to search the web for them, as none of the instances I found had this info up front. Just a generic "create an account page".
Lemmy suffers from the same issue lots if tech does - it's driven by tech people, and we are notorious for assuming other people know what we know, plus, we'll be damned if we're gonna write any more effing documentation.
Ya want more people, gotta at least explain this stuff on the sign up page, hell, explain it everywhere...always have a link to "What in the world is this Lemmy thing?"
What he did, starting at age 50 (I think - He for sure was no young man), is just astounding.
And he had the presence to film enough of what he did so we have this record showing how much work it takes.