Hey matt, You got some great advise from @Patrick Bosworth, I would follow what he showed you exactly. I wanted to show you how you could take what he sketched for you and add some structure to it, I hope it helps :)

Hey @matt barton! Nice start here! A few things to consider, the gesture is looking pretty stiff, the proportions could use some tweaking. First, gesture- Your character is stacked upright (almost right against your vertical head measurements) which makes him feel like he's standing up straight, balancing on a tight rope, or he's been caught and is surrendering. You can really push the centerline of the body into a fluid S curve for a more graceful flow to the body which sells an upward flying momentum. Same with the limbs, they're pretty straight and stiff, you can push more curve into the overall flow of the arms, and consider leaning on more asymmetric poses to add some more dynamics to your character. Proportionally the head is a little large for the chest/frame, and the legs and arms feel a little squat for "Heroic" proportions. Especially with the low angle you're viewing this character from you could lengthen the legs a bit to sell the idea that the figure is flying above the viewer. Take a look at "Heroic" proportions from Loomis and you can see the head stays relatively the same size, but the chest, hands, arms and legs are much bigger adding to the imposing presence. Another thing to consider is the overall storytelling of your pose/costume. The cape is a bit inactive, and the hands could tell more of a story. The open hands suggest a peaceful, welcoming character, but if this is a threatening or commanding character, you could use those hands to convey a sense of power and control over their surroundings. The cape is a dramatic element to include for a character and you can use that to also sell the idea of flight, power, and movement. I hope this helps! Keep up the good work! Looking forward to seeing this one cross the finish line!