In only look at selfhosting things that provide a docker image. This is how it should be: the internals are hidden from your and you just care about the data an

In only look at selfhosting things that provide a docker image. This is how it should be: the internals are hidden from your and you just care about the data and the configuration. If you want to use a monolith you will have conflicts sooner or later. Of you want to use multiple VMs you need to orchestrate them. If you know how to do the above you are good to go to learn docker which is ultimately much simpler.