Pavle,
This might be very useful. The karts are very heavy with the extra safety stuff. If they have differentials this doesn’t apply. Try leaning outwards (left) as you turn here. Hang your weight over the planted wheels on left.
Also this thread has some info in it that isn’t exactly to your question but possibly helpful. Accessing peak performance - #9 by speedcraft
It’s not about how to take a turn but rather more about thinking about speed and there’s stuff in there that is directly related to this. Take a good look at the writings of Warren Chamberlin in that thread, he offers some insights that are exceptional.
Another thought: we have a rental kart racer from Holland named Matthijs who likely has rental kart mastery. @Matthijs_Hofman He runs and races a rental kart series.