> It wants me to start with the new and describe command

jj doesn't "want" anything.

I always end a piece of work with `new`: it puts an empty, description-less commit as the checked-out HEAD, and is my way of saying "I'm finished with those changes (for now); any subsequent changes to this directory should go in this (currently empty) commit"

The last thing I do to a commit, once all of its contents have settled into something reasonable, is describe it.

In fact, I mostly use `commit` (pressing `C` in majutsu), which combines those two things: it gives the current commit a description, and creates a new empty commit on top.