How much practice do new driver-engineer pairings really get?

I believe both Seb and Carlos generally spoke well of Adami (despite some of the selected team radios we heard from Carlos), but Lewis just came from a dozen years with Bono, so I imagine lack of familiarity is a huge factor here.

I don’t know what the exact procedures are inside an F1 team, but it felt like Hamilton and Adami were running a full race together for the first time.

I would have assumed they’d go through several simulated races with various scenarios—letting the race progress, reacting to changes, making all the calls they normally would—before the season starts.

Maybe they do this, and my impression from the live race radios is off, but it didn’t sound like they had much practice together. Does anyone know how much race engineering preparation actually happens before a season?