You do need help. Read,question,watch all you can but you need to be with someone who can actually hands on show you. Horses are not black and white they stay in that fuzzy grey area. Clubs and organizations are great 4-H is a great all round club, Pony Club is english only but both are very good. You have a win-able situation problem is your horse knows more than you and he know he does. In the long term if your horse is trained,he is trained PERIOD. In/out of a ring, any day/week/month of the year,stalled/field kept,windy-cloudy/sunny-calm... Don't make up excuses that just allows bad behaviors and lungeing is a very good way to increase his stamina. Today 10min hes tired, next week 20, next month 45 until you need to lunge for 2 hours to take the "edge" off. But no matter what don't give up.