Hi fellow self-hoster.
Almost one year ago i did experiment with Immich and found, at the time, that it was not up to pair to what i was expecting from it. Basically my use case was slightly different from the Immich user experience.
After all this time i decided to give it another go and i am amazed! It has grown a lot, it now has all the features i need and where lacking at the time.
So, in just a few hours i set it up and configured my external libraries, backup, storage template and OIDC authentication with authelia. All works.
Great kudos to the devs which are doing an amazing work.
I have documented all the steps of the process with the link on top of this post, hope it can be useful for someone.
Feel free to ask, even in pm, if I can help. Not a guru myself, but getting a bit more experience overtime.