If you are really serious about training, I would find a trainer. If you don't have experience in training horses, this more than likely is not the best place for you to start. Otherwise, if you are set on training a horse all by your lonesome, then I would suggest selling him and finding a younger prospect, which will be easier for you to handle. You always have to look out for yourself first. Ask yourself if this horse a danger to you or others? If you feel that he is, then perhaps finding him a more suitable home is a better option.