Installed Nextcloud-AIO using the docker script, took about 4 - 5 terminal commands. Practically zero issues! Hopefully someone else can provide some help in the thread!
I have it set up. Try the AIO docker image. Once you get it set up, it pretty much just works. You just pick which office suite you want, check a few optional features if you want 'em, and it handles the rest for you. Most importantly, the AIO image is from nextcloud. They test it, it always works because it is the blessed version from them. If you're not a Linux guy, don't try the other installation methods, they're much, much more difficult.
I'll give it a shot. I've tried so many different approaches already. I think I maybe tried to install AIO straight onto a linux vm; don't recall how it got derailed. I did build a Lubuntu VM for experimentation. I really wanted to get an Ollama chatbot running to assist me in my future digital endeavors, but it just wouldn't come together.