I would usually recommend a patching method rather then a full download, I think a good place to start would be here: https://www.reddit.com/r/GenP/
If you already have Nextcloud running you can use the Nextcloud Forms app
Honestly, I would say because you just have less struggle. I had just a lot more problems when I was using Ubuntu instead of Debian. But I thinks it’s mostly personal preference
An operating system