I volunteered for our local 'Dog Pound' which was a branch of the Police Department for several years before and during it's metamorphosis to a non-profit shelter. It was an ENORMOUS undertaking. Both to start, and to continue. There were constant issues with what was considered adoptable, and what was not. Unfortunately, it became an easy out for many who could not care for their pets medical needs..just drop them off. And there were a ton of issues with
people, not pets.
The woman who helped get it off the ground completely burned out in a few years. And during that few years of time, her she had constant guilt about her own personal pets not getting the one on one they were used to. No more time for any of that. No more time period. Volunteers would be approved, and then found out to be hoarders. Very, very difficult.
Since your heart is in the right place, why not just volunteer as much time as possible to your local shelter? It's a great place to 'get your feet wet' as to the inner workings and the heartbreak.
And you can always take in one at a time and rehab...by attaching yourself to a yorkie rescue that's close to you. They are always looking for foster homes for mill dogs.
Joy