Maybe you should be inspired by the TakeAway system developped in the Grok Tiddlywiki. Soren Bjornstad developped this system of recurring exercises to develop one’s knowledge of the Grok’s content.
Soren Bjornstad is also the author of TZK: One of the Best Zettelkasten Editions of TiddlyWiki a way to handle large amount of data collection…worth the reading.