There are a few out there. I can't remember them all as it was a number of months ago when I was doing research but I know sighthound is pretty popular.
Where you may get into issues is when you start to add more cameras you need more power. So not sure how many you are planning to ad or even if the mac mini will handle them all. But its a fun project anyways.
Totally understand. I just feel like these days anything HA related you have to become a guru so when things break you can figure out why. It becomes a full time job.
If you want to avoid all that then probably buying a self contained NVR (hardware/software package) might be your best bet. You may be able to just set it and forget it.
I'm always tweaking my BlueIris setup. But I like that. Same way I'm always messing with my Unifi wifi and my HE. I just get an idea and try to do more.
