learn.adacore.com (https://learn.adacore.com/courses/intro-to-ada/index.html https://learn.adacore.com/courses/intro-to-ada/index.html) and the Ada Programming

learn.adacore.com (https://learn.adacore.com/courses/intro-to-ada/index.html https://learn.adacore.com/courses/intro-to-ada/index.html) and the Ada Programming wikibook (https://en.wikibooks.org/wiki/Ada_Programming https://en.wikibooks.org/wiki/Ada_Programming) are pretty good tutorials that cover Ada including Ada 2012 features. I recently found this Awesome Ada list (https://github.com/ohenley/awesome-ada/blob/master/README.md https://github.com/ohenley/awesome-ada/blob/master/README.md) and have found it useful to discover libraries and frameworks written in Ada. With the increased interest in safe programming that Rust has stoked, I am hopeful that Ada might also find some renewed interest.