Dont feel bad about yur skills. My lunging isnt very passable either. But her sounding young, you'll eventually have to do ground work with her. You could learn together if ya'll had too. If your not able to slow her down on her back, you will have to establish youself on the ground. This goes for english AND western. 
There are a few exercizes you can do, and I could give you a few links to some websites about lunging if you want. It may seem impossible now but ground work does miracles on otherwise racey horses.
On her back control with your aids is essential. Your five aids, seat, legs, voice, hands...and I cant remember the fifth one, but I believe its the crop (riding whip). Start at a walk, keep contact with your reins, shell prolly be trying to pull ahead of the bit. Youll feel it in your hands that shell be pulling. I know you prolly ride western but youll have to do this anyways since lunging doesnt sound like an option. Make sure your hands are soft. Soft hands are the key, SOFT HANDS whoops sorry, im on moms phone lol. So plz forgive any undue French!
. Anyways, soft hands dont mean that you grip on the reins is loose, it means that your sensitivw to what the horses mouth is doing. Your hand should be around the reins with the end going through your yurr ring finger ebd. Ilk post a pic of it later since it prolly doesnt mke any sense here! Keep your grip firm and forgiving. Unforgiving hands arw the fault of many riders. Unforgiving hands mean that everytime yur horse gives with their head, yur hands must give a little too. Which is likeba reward for the horse, a good experience! Unforgiving hamds mean that yur horse gives, but yur hands just keep taking. Making the get high headed, racey and a number of other frustrating. Issues are thrresult of from unfoegiving hands. Ill type up the rest of my answer later because im messing up my apellinf really bad o. Theoa phone.

There are a few exercizes you can do, and I could give you a few links to some websites about lunging if you want. It may seem impossible now but ground work does miracles on otherwise racey horses.
On her back control with your aids is essential. Your five aids, seat, legs, voice, hands...and I cant remember the fifth one, but I believe its the crop (riding whip). Start at a walk, keep contact with your reins, shell prolly be trying to pull ahead of the bit. Youll feel it in your hands that shell be pulling. I know you prolly ride western but youll have to do this anyways since lunging doesnt sound like an option. Make sure your hands are soft. Soft hands are the key, SOFT HANDS whoops sorry, im on moms phone lol. So plz forgive any undue French!
