You are too heavy to be riding her. She is not going to hold up to it.
And you would be better off with stocky QH around 15 hands or so, and I mean one of the old bulldog type for you to ride.
Like it or not, close to 200 lbs is what you are, add saddle to that, and quite a bit of weight. I know, I weigh 212, and I do own a chunky monkey to ride.
With western saddle, you are looking at about 220, give or take which would mean you should be looking for horse that is around 1100 or better, plus need to look at bone structure too.
While you aren't tall, the amount of weight you carry will really throw your balance off, especially on smaller mount.
Horses make me a better person.