I am the proud new owner of a lovely 4 year old Hanoverian x Thoroughbred gelding, who is green broken. Although I have broken in horses myself, I am not used to continuing on with a horse who has been backed by someone else. Where can I start? He has the basics, wears all his gear without issue, but I am nervous as to getting on him for the first time. He has apparently 'humped' but not bucked under saddle.