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.
Choctaw and Cherokee horses are known for their hardiness, vigor, and adaptability. They are typically easy to train with a gentle hand and can be very people oriented. They make excellent trail and endurance horses but have the potential to do well in any riding discipline.