im only a newb at buying a horse i've had some riding lessons
Unfortunately, "some riding lessons" is just enough to get you hurt when trying to take on an inexperienced horse who is already showing major signs of being a disrespectful spoiled animal. Especially since you don't even see the biting as a respect issue.
This is NOT the type of horse you want as your first beginners horse. You want a well trained horse you will gain confidence with as you learn, not one who is already trying to hurt you.