A good introductory article is this one from Java Magazine:
https://blogs.oracle.com/javamagazine/post/java-in-the-brows...
A good collection of specific, detailed how-to's for various use cases is in Tea Sampler here:
https://frequal.com/tea-sampler/
A more general collection of education and advocacy articles are here:
I do agree that more needs to be written about this mature, permissively-licensed tool that makes Java work in modern browsers. Hopefully these links are a start.