I didn't find a suitable place for my left arm
Welcome to the wonderful world of helicopters!
There is no point getting too technical about the way one holds the control. All aircraft are different. You may get into a machine with swanky padded seats and be 4 inches higher anyway, or verse; get into an old banger with seats like a park bench and find the collective in your armpit!
My opinion is adjust and adapt to what you're flying at the time, but above all, grip the thing the way it's meant to be gripped; like Rosey Palm and her five daughters
