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.
I ride Clydesdales, and my favorite saddle for them is the late 80's to mid 90's circle y equitation seat. Preferably a richard shrake version, as they have a super wide low profile that fits a draft horse very nicely.y husband bought a Billy Cook roping saddle a few years ago for $100 from a coworker. VERY comfortable saddle, but the stirrups don't go short enough for me and it's very heavy. It fits our paint mare great, but is a little long in the back our other horses.