As someone who only occasionally wanders into the forums, I consistently notice the stream of new users posting this same question repeatedly as their posts appear on my main page feed on a regular basis.
To me, it’s clear that whatever user flow currently exists for new users is leaving a decent number with this question and I feel we need a solution to reduce, if not eliminate this issue.
My suggestion would be to have a banner at the top for level 1 users that says something like, “Completed all your lessons and not sure what to do next? Click here” that links to the part of the WK guide that explains how the SRS works.
This banner could either only display after a user has completed all the initial lessons, or it could be automatically displayed for all level 1 users regardless of lesson status, but I think it’s clear there are a number of users who need to be directed to this information. I wouldn’t consider it unreasonable to extend this to levels 2 and 3 as well, as many users do as I did and sign up initially without actually using WK right away.