& the vet & farrier both say that we're a perfect match. I weigh 218# at 5'3" & Callie is 14hh, barely, & we do fine. She's is a Morgan mix, maybe Arab, maybe Quarter. No one really knows. I'm even a very inexperienced rider & Callie never has any problem. I wear out long before she does. So far we only ride in the roundpen or the arena where the footing is soft, but the only recommendation I got from the vet was to start out slow & just be aware of any signs of fatigue. The farrier just said to use a mounting block to mount without pulling on her or flopping down on her back.
I have a friend who trains Arabs & he has me come ride regularly to teach a couple of his horses better balance & to pay attention to their foot placement. I don't know about that, but he seems to think it helps. Maybe they're just grateful to have his skinny behind back in the saddle after me.
I am very self-conscious about my weight, but it doesn't have to get in the way of my love of horses or a lifelong dream of having a horse. Don't let it get in your way.