It will feel like some one is pushing on your teeth. The brackets stick out a bit from your teeth making it feel like you have a full mouth of metal, big lips and your bracket may rub against your lips feeling again like a metal file.
While some breeds may be more suitable than others for a beginner rider, there are always exceptions to the rule. Quarter Horses often make great beginner horses because of their even temperament, but some can be quite hot or energetic for a beginner.
American Paint Horse - Has an easy going temperament & used for cattle work. American Quarter Horse - Versatile, popular equine breed that's great for new riders. American Saddlebred Horse - Result of selective breeding of four breeds of horses. American Standardbred Horse - Most of this breed complete a mile race in 3 minutes.