As a beginner, buy the horse that "is" not the horse it could "be." You will have enough on your plate learning and gaining confidence... Trying to teach and guide a horse while you still have so much to learn is a dangerous combo. I am also a newbie horse owner, and you need a horse that has been there and done that, who (in it's own way) will take care of you when you are unsure or at the very least not try to take advantage of a moment of hesitation. He probably is a great horse and has potential... For someone else. Keep looking.