I'm taking Muay Thai in real life, and I'd like to just be able to high kick Uke in the head, just a basic Muay Thai rear kick. And I'm not sure how I can get simple movements like this to work without falling over like a noob. I'd appreciate any help on this, I further clarify it's mainly for messing around in singleplayer, so if I need to mod it or something like that I will.

PS: I further clarify that I'm not really requesting moves, I'm just asking how to balance off such simple kicks, without flopping around doing handstands, and land them or execute them as simply as they are executed in real life.