This explains how to use Omeka.net (Classic). From Chapter 3 onwards, the usage is common with Omeka Classic.
I created two types: a summary article on Hatena Blog and a Zenn book.
Zenn
https://zenn.dev/nakamura196/books/a06c31c1cc3c37
Hatena Blog
https://nakamura196.hatenablog.com/entry/2022/03/22/232710
I hope this serves as a useful reference for using Omeka.net (Classic).