Don't panic. I bought my goat from the board from Tesco's and managed not to kill it, with no previous experience. Find your self some nice hay, local horsey FB sites, expect to pay between £2.50-£4.00 a bale and a hay net. You want hay that's meadow hay, depending on you outlook full of weeds or herbs, no ragwort. They waste more than they eat, they are very picky. If she is one her own be prepared, its like having a large demanding baby and she may cry a lot so you have to make time for her, put her close to the house. Take for walks, I used to put mine on a tether and when she got fed up she would pull it out and come home. Do not feed to many greens it will give the s***s. Go on line and by a wormer, or ring an online pharmacy. Buy a goat book or google goat keeping.
Keeping all animals, including humans is common sense, I have managed to keep goats, pigs and sheep with the aid of books and good old google. My Floppy was a very annoying goat would eat all my roses if given the chance and was much part of our family, if you can not give her companionship it may be better to find her another home, there is nothing sadder than a goat crying.