Yes, that distinction is clear to me, but as you said if English is not your first language it might be less clear or the process might seem scary.
I feel there could at least be maintenance of the documents themselves, which never hurts. It's a part of Fedora too! We have the nice site for Packaging Guidelines themselves, but Joining the Package Collection Maintainers wiki page is a little dated in layout and whatnot. We could earmark that.
I haven't thought of submitting my package at all until last week. I've maintained it on Copr for several months now, and I've spent a few hours with a Debian user who was having troubles with an build script I made for Debian & Ubuntu users (they had library conflicts because of Matlab).
It's clear, but it's not plainly stated that package submission to, and more importantly inclusion in, the official package repository is a different thing from simple application distribution. Responding to users, addressing edge cases, and ensuring breakage don't occur is definitely the actual responsibility that comes with hurdling through the process and having a package included in the repo.
For all other intents and purposes, Copr, the Outer Rim, is the place to be. It's fun there, a bit of a Kessel run.