It is a but cumbersome, but I think that's largely because Evennia is not a codebase a lot of us are used to.
I did have to turn off the Public channel. It was way too spammy. The Grayson channel has been awesomely inviting and welcoming. I've used replying to Classifieds to get to know some other folks.
To me, the 'get involved' curve is no higher than any other large game. And the commands are just learning a new codebase. What helps with that is that, in my experience, the players have been SUPER helpful, as have the staff. I forget commands all the time and if I fail to remember what they were in the help files, I can usually ask and get a helpful (non-snarky/mean) reply quickly.
It would be nice of the helpfiles were on the website and searchable. And I'm sure this is something that's being considered (since, AFAIK, it'd be easy to implement).