I got my first horse on the 3rd but I didn't ride her until yesterday (cause she had a leg problem). So when I get on she goes out and around and when she's coming around she heads right toward the gate and picks up speed like she's trying to see if I'll fly off. I'm kinda new to riding so I didn't exactly know what to do then so she did that about three times and the last one she ran at the fence at a gallop. Luckily I didn't fall. So after that my mom suggested that I keep her at a walk (I know "duh"). So I did that and was practicing my turns and stops. She doesn't listen when I try to turn her and stop. She kinda acts like she's not broke but she doesn't buck me off (just tries to see if I'll fly off).
My friend rode her today (I warned her but she still wanted to ride) and she fell off twice (and she's a better rider than me). Both times she fell was at a gallop. It's like once we let her get up to the trot she just shoots. She was a barrel horse before so that's probably what it's from. A lady that was at the stable just said that we should keep her going in a small circle at a walk or trot and practice stopping. She's really bad at stopping.
Before I got her she was only ridden on the weekend so she hasn't really had that much riding time in. And the only time she got to go out of her stall was when she's used to ride. So she's cooped up in her stall (at least) 5 days a week and not getting any exercise. (Not anymore though cause I got her.)
I also didn't lunge her either days. I tried but I didn't have a whip to get her going so I'll go buy one tomorrow. They don't have a round pen either only an arena.
Right now I'm at a loss and really discouraged . So any advice would be real nice. Is she doing this cause she's challenging me? Or why do you think? What would you do?