I run Nextcloud from their .zip, instead of the openSUSE package, mainly because the updater will work perfectly. It’s not hard to get it working that way. Nc have good docs, and I could easily guide you through the process. I assume you have a LAMP server up and running, are familiar with creating a database, the rest is peanuts. And I’m one of the last people on earth calling something peanuts :D. Just start a new thread if you don’t manage
EDIT: FWIW: I’ve got it up and running on a VPS, and have Collabora Online working, Talk and many other nice apps for Nc. In fact, even my Android phone hardly uses Google’s services anymore.