Walking on hind legs?

My dad’s maltipoo (Eigen) and I have been doing clicker-training. When he does a desired behavior I say Yessssss! cli-CLICK and immediately give him a piece of cheese. We have been practicing SPEAK and QUIET in order to teach him there are times we really want/need him to shut up. He knows and obeys SPEAK well enough, it’s the QUIET part I want him to follow. I‘ve been trying to get him to associate SPEAK and QUIET have something in common with each other, hoping he makes the connection. I give a couple of SPEAK commands, reward desired behaviors, then a QUIET command. I count two Mississippis and if he just stares at me, he gets his reward. I won’t know if this will work until he freaks out over a doorbell ring or worse someone getting out of the car he’s in. He goes apeshit at the thought of being left alone in the car. Getting him to perform the desired behavior under stress is like wondering if you can use Karate you trained for if under a real attack.

To break things up, I thought about doing something a little less serious. He often stands (and hops) on his hind legs when something or someone he wants is out of reach. As long as he isn’t jumping on people or things that don’t concern him, it’s an adorable trait, not a problem. I’d like to add this to his repertoire of tricks. With Animal Farm coming out in theaters I was hoping to make “Four legs good, two legs better!” the command. But that’s an awfully long phrase to use, isn’t it? What do you suggest we do?