Not really… the closest thing to an organized tutorial is Jinja for Ninjas . There’s also a Jinja Cheatsheet you can download. Unfortunately, both of them are showing their age. Since the HA devs and community are regularly adding template functions, there are often better/easier ways to do some of the examples shown in either source. For the most up-to-date list of available functions, the best source is still the Home Assistant Templating docs.
The forum community has been working on creating and indexing useful examples and explanations which can be found in the Cookbook Index.