How to install Nextcloud Office?

I installed so far “Collabora Online - Built-in CODE Server 23.5.301” and “Nextcloud Office 8.1.1” on my Nextcloud Hub 5 27.0.2

What comes next? I can not see how can I start to use it.

Go to administrative settings and find the config for it, there you hsve to set nextcloud office to use built in code server. After tat, any office document will automagically open inside nextcloud…

It is set to use the internal CODE server, and this one can apparently be reached (green light).

Opening documents works. But how can I create a new document?

Create a new file with respective file extension via the + icon right from the breadcrumbs

Works, thanks a lot!