For some time already I was looking for a cloud solution that I could replace BigTech’s options. And a cousin have suggested me NextCloud.
I just installed it in a Digital Ocean VPS and started my tests. For the record the best references I found about the installation process so far:
https://wiki.learnlinux.tv/index.php/Nextcloud_-_Complete_Setup_Guide
Setting a second user up: https://www.youtube.com/watch?v=g68wuUrrRMs