Adopting a dog of my own

When Lady was around, my home was her second home, the same thing goes for Rocco.
During this lockdown, it gets really lonely, it was like that as well before the lockdown situation and I am always alone nearly all the time.

I've been thinking about adopting a dog of my own because I know now with COVID-19, the shelters will need to urgently re-home as much pets as they can. I just don't know how Rocco will feel about it because 1. He's male and 2. He's still a little anti-social. When we first got Rocco, he was a complete nervous wreck, he warmed up to me soon though (probably because he could sense I was blood related and considered me as part of the pack) but he still was very shaky around strangers and other dogs. I really would want Rocco to have a new friend and I would like to make a new friend myself. How do I go about doing this?