This is my first attempt at these.
I think I'm holding the angle with my legs ok. Is my lower back coming off the ground too much?
With the iM I can see the ankles aren't diectly below my knees and knees aren't 90*, easy fix.
Also These causes a bit of discomfort/pain in my elbows, I couldn't hold for 30 seconds.
Those are some of the funniest faces I've pulled doing this, quite amusing indeed lol