At https://hubzilla.org/page/hubzilla/get_involved you will find an overview of the different ways to contribute to the project.
This forum here is the right place to collaboratively discuss improvements to the user documentation, its translations, user interface translations and the creation of user tutorials.
If you are looking for support as a user, you can find the right forum at https://zotum.net/channel/hubzillauserssp
If you are looking for support as an admin, you will find the right forum at https://zotadel.net/channel/support
If you want to help develop the code, you can find the right forum at https://zotlabs.org/channel/hubzilla-development