Eclipse sirius. manuals in Russian

Question

Java

There is a wild desire to make the diagram editor of your dreams. Something like this:
www.archimatetool.com
I came across a cool thing:
https://www.eclipse.org/sirius/
but I don't have enough knowledge to figure it out. Tell me:
1. resources, cases, communities, where you can get more information on how to bungle your editor from Sirius.
2. Actually, what to study in theoretical terms to understand? what sections of java?
Colleagues, do no one have experience?

Answer 1

https://habr.com/ru/company/cit/blog/266433/
and other articles of the author are interesting on this topic