Uh, did I say I was going to make a tutorial? I remember saying that and I was but then I realized that I can't because I am bad at explaining what I've learnt about drawing because it IS A LOT. So sorry about that but I'll give you some advice
omg it's going to be a rant again! Gomen gomen!!
and my "attempt" at making a step-by-step.
I've been drawing for 7 years, it's my primary talent and what I was mostly known for back in school. I was that kid who liked to draw (not the kid who knew how to draw, people don't say that because back then you suck duh) and I kept at it. I don't know about you but you're not going to get better unless you keep at it.
So when you asked me to create an OC for you to help you improve your drawing . . . It took me a while to process how that would work. If you expected me to draw your OC in every angle for you to study, I'm sorry I'm not going to do that. Well, at least not for a request because it's a lot of work and I still got a lot more requests but hey . . . at least you get some words and few drawing free haha . . . uhm.
You said KH is one of your inspirations, well I love KH (the art, never touched the game) and I've spent countless hours studying Tetsuya's style and how he draws his characters. I understand how he draws and even why. So unless you can say the same, google images is your friend, find art you like and copy it.
And about the OC, I leave the name, colouring, clothing/costume, background story up to you. He's your OC, to me he's a just a spiky haired kid with fox ears.
Again sorry, I swear I was trying to cram my whole art experience into this description. If you have any questions feel free to ask.