Help me. I want to learn about nextcloud but this is a relatively new problem, people that help me give me an outline or a catalog of issues to find out go sir>? If you have any documents or send me anything. Thank you very much !!!
You can start with the official documentation: https://docs.nextcloud.com/server/11/admin_manual/
Or if you want to start to install, perhaps search a tutorial that suits your distribution.