So, I joined a glider club today and took my first hour of instruction. Looking for tips for the transition. My instructor is glider only so he may not have the insights a private pilot would. One thing is confusing me already though. When thermalling, we were cross controlled not coordinated. The string was significantly on the side towards the turn with lots of rudder and opposite aileron to prevent over banking. I thought the string was supposed to be centered. How do you know how much rudder to use (he was using nearly full rudder)? It was a very small thermal so we were making a very steep turn. I’ll ask him this question next time, we didn’t have time for a debrief after the flight.