[Martial Arts] Using Judo as flier

[Sigrif]

I am making flying character with judo and have some questions. There some of it:

When using "Using Your Legs" rules, can you use both hands and legs to grapple and throw someone using flight? What bonuses should i use?

Can you grab your enemy and lift them into the air and if you can, how? How your enemy realistically can resist your movement at all? Can you pin midair?

"Using your legs" rules say that you end your turn lying face-up, but what if you using this in the air?

How parries with leg or feet works for flying characters? Can you parry more than ones with your legs? Can you parry attacks that comes from below in any zone? Can you retreat?

For now that's it, but i'm sure there gonna be more questions