@Bonifratz @h333d It isn't easy, but it's so worth the effort, and I just begun the Proxmox journey and I have plenty of things to learn!

Since this is a complex subject, you need to take your time and don't hurry the learning process. Begin with baby steps, and hosting services restricted to a LAN, just to be safe. When you are comfortable (after some weeks or months), think about sharing a service to the public, if possible and what you have to do to properly secure your devices and network!