Instructions for working in Docbook, where can I get it?

Question

Documentation

I've already googled completely, I can't find a good instruction for working with Docbook.
I just need to practice on the subject, but I just can’t figure it out.

Answer 1

Ask questions - I'll tell you. And by the way, it is better to write such questions not only in the xml tag, but also in the Documentation tag.
And by the way, it will be very interesting for me to find out in which university or in which courses they teach working with Docbook :)