Wait, let me get this straigh. You have a five month old appaloosa... and you're HAVING HER BROKE IN MAY? So she's like this size?
._. If I didn't misunderstand you, you're about to make a HUGE mistake. A five month old horse is a baby. Not only a baby, but a baby that has just been weaned from it's mama. Not even NEARLY old enough to ride. If you ride her now, or even put a saddle on her, you could VERY SERIOUSLY injure her back, her legs, and all of her joints, or at worst- kill her.
But then I look at your signature and it says 'shelly45 is I am getting ready to have my 1 1/2 yr old apoloosa broke-first time having a horse!!!'
Which is it? 1 1/2 years old is still FAR too young to start riding as horse, as she's right in the middle of her growth period right now. A horse should never ben broke before two years old, and most people wait until 3 or 4 because a horse doesn't stop growing and its spine/joints don't fuse until it is 5 or 6.
I'm not going to tell you that you have no business owning a horse but I am going to STRONGLY suggest that you re-think this. Horse care can be very complicated and dangerous, especially if you have a baby.
I really hope you have a GOOD trainer, and please do not ride a baby horse.