I prefer to feed the goats first, then when they chew the cud, milk them. They will stand with full bellies!! But with the goat being new to you, it may be easier to stick food in front of her, while you milk. If she has a collar on, and is being difficult, then tie her up while you milk. Make sure has a collar on though, just tying rope or string round, she could end up hanging herself.
I assume you can hand milk? If not, it will take you some time, and the goat will more than likely eat all the food and get impatient. If she is used to being on the stand, it may be she does not like any other method. Also, you are a new person to her, and they can be funny about letting their milk down. They can be clever at this. Even though you think you have got all the milk out, I always, stroke down the udder to the teats and find some more.
Is there just the one milking?
Once she gets into your routine, she will be fine with the milking.