I understand. If it was up to me I would consider the permission settings a priority, as agreeing to all of that can be a pretty big deal for some people (I know it is for me). Some users may be willing to go all the way, but many might be gelous or scared of losing their Reddit accounts or even giving access to them to what, in their eyes, would be a complete stranger.
Anyway, as I said, the idea itself is cool. Hopefully your project can be a gateway to the Fediverse for many Redditors, as the enshittification goes on.