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.
There are good horses in every age group, from very young to very old. 1  And, there are exceptions to every rule. But usually, for a beginner rider and owner, there are good reasons for buying an older horse. 2  If you only plan to ride recreationally once a week or so, an older horse is the prefect choice.