Welcome to the madness. Octane is passed out on Thursdays.
Comparing the Grom to the 310R, the clutch engagement is different, with its leverage at the lever and inside the motor with the cam surface on the clutch disengagement. The lever is softer in pull on the 310R and the engagement is closer to the bar compared to my 2015 Grom. The stalling of the motor is due to the details prior along with the very light idle. It only takes a little practice being a bit more aggressive with throttle input and clutch engagement.
Give a man a milling machine, a lathe, and other dangerous tools and he shall create the greatest pile of useless chips ever conceived.