Pick a scene. The other person is played by a partner who reads like a real human — engaged, bored, guarded, or a no. Talk. Then get a debrief that names the moments, not lines to memorize.
Random is the real skill: you have to read them. You'll guess before the debrief.
Nobody ships this and it's the actual skill. Handle a no forty times and it loses its teeth.
You didn't know going in. Commit to a read.
Reading the scene…
In the real world this feedback is invisible and slow. Here it isn't.