i know it’s way past since your recital but since others might see this, felt i should post mine
x x x | x o o F
a c# Bb
then normal g, e and so forth
basically, finger g but also add the a and c# in left hand wing joint, and Bb on the right hand. this gets your left thumb closer to the c key for the high b (which i finger as normal) and there’s no confusion in your right index and pinky.. they don’t move. it sets up nice anchors and helps cover wide distances with the left thumb.