I suggest you have 2 separate physical devices.

1 - a NAS 2 - a server that you’re running everything on.

Use OMV for the NAS if you’re not technical enough / want less maintenance and just keep your data there with only a backup app installed,

On the other device pick whatever you’re comfortable with, docker is the mainstream choice, you’ll get loads of youtube / forum / lemmy support, but there’s other options of course.

The advantage to this setup is that you can backup your server and if when you f*ck up you can restore it again.

Less eggs in more baskets

And as others have said, look at your router & internet security too