You need to get her in a round pen ASAP. Get her feet moving. Send her away and don't let her stop until she has done at least 4 laps. Eyes on eyes. you stair right into the eye that is facing you like your eyes have laser beams in them. Do the crazy lady thing if you have too. Keep your hands wide open like a mountain lion's paw. Have really supper high energy. Like 4 cans of RedBull energy. You may need a long line to throw at her back feet or atop her back to keep the pressure up and her moving. Then turn her in the other direction and do another 4 laps. Again high energy. Make her gallop if you can but nothing less than a canter.
Then turn her around again an lower you energy but keep her moving. If she begins to lick and chew, lowers her head, makes smaller circles and or locks that inside ear on you then you are getting her attention. Turn her around going the opposite direction ever 4 laps until you get 3 of those 4 signs. And even after you get the 3 of the 4 signs watch her that she is dictating when to stop.
Next, when you think she is giving you the 3 of 4 signs willingly and not as a bluff them really lower your energy. Let her stop and face you. if she even thinks of giving you hinny. Send her away for another 4 laps each direction. A fast trot is fine. Once she stops and faces you. Walk to her left shoulder with your body at a 45 degree angle looking at her left shoulder. See if you can get within an arms reach to rub her head.
If she even blinks to bit or give hinny. Bam... Back to work she goes. If she lets you rub her head. Than turn and walk in a half moon shape circle way from her. If she follows good. If not back track and rub her head again to invit her to follow you. If she is just frozen up. Then send her away again.
Do thins untill she follows you around like a puppy dog.
Next. Stop and rub her withers. Then get her to lower her head. You tube has lots of video's. this is a good one: https://www.youtube.com/watch?v=nZ_k4gKNDnM
Do not leave that round pen until you have done both these exercise. Expect it to take 3 hours. Then when you get it done in 30 minutes all will be good. But if you think you can do this in 30 minutes. Forget it, you'll be there all day.
This your first new day with the horses. If you can groom her afterwards. But my guess is she doesn't even know how to tie yet. Do not under any circumstances use a lunge whip or crop during any of this work.
It looks like she needs all new training on tying, grooming, hoof picking, washing, leading yada, yada, yada... I would invest in a side pull halter. But that's me. It's my #1 piece of training equipment. I would start with leading. that is for both forward and backward motion.
Start each training session a few laps in the round pen. Don't ever lunge her.
Point and cluck only. Big energy and/or long line at the feet to get her moving. This gets the stall jitters out.