reStructuredText Practice Resources

Hi, all! My new employer would like to switch our tech docs to reStructuredText and conversion with Sphinx (Read the Docs template). I have had no trouble with the basics of rST, but I would like the chance to practice with it. I’m having trouble finding any resources that will help me do that (i.e., lists or collections of finished rST docs (of various complexity; PDF or HTML output) that tech writers can duplicate to continue to build proficiency. If you have any links or other ideas that might accomplish the same goal, please contribute to this post. Thanks guys!

(Btw, the closest I’ve found is this resource: https://www.sphinx-doc.org/en/master/examples.html. However, I’m looking more for challenges like coding challenges or like how Dribbble is for front/end practice.)