I decided that living on a hope and a dream of maybe someday seeing if my Mac Mini still worked I can now gleefully say it is working* if I cannot figure out how to update it further oh well I will just continue on with it as is and harden it the same way I do everything else. But right now it is downloading my music library, which I will promptly backup before trying to update it further.

*I need to figure out how to update it to the last OS version it can handle.