Nextcloud has worked wonderfully for pretty much everything except for the office suite, which almost never works, I've heard AIO runs it fine. I've just had more useful luck with collabora on my phone and libreoffice on desktop that I'm not willing to fuss about to try and get it to work for the fifth time just for it to break again.
As for installation, I went the nextcloudpi route on a normal PC and haven't really had any issues that weren't my own fault. The biggest struggle I had was figuring out what packages I needed to install on a minimal Debian install before I could successfully run the installer.
I did spin up a nextcloudpi lxc container on proxmox since I'm expecting to containerize it in the future and it just started up perfectly along with the normal office suite issues.