since you've just got her let her get used to the suroundings first. Just leave her for a week or so to let her settle down.
Change the bedding once a week,give plenty of water and good food is the secret to a fluffy hammy
Have fun with your new one feel free to ask anything. we'll do our best to help you out.

Welcome to hamster world!! 
For me i feed them this..

Prestige Nature Herbs and Fruits

Lol.. i bought this in Petsmore around Rm14.95 if i not mistaken..
Sometimes i give them eat human food like carrot, broccoli, cucumber, apple, kiwi and etc.. but all raw from the refrigerator.. 

Yeeahh~ just to lighten their day up.. Maybe like once a week..
Anyway u only have 1?

I bought a new cage for my Mickey!!

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Do u know that u cant just get a hamster and put them together with another hamster.. They will tend to fight with 1 another because they are completely stranger to each other.. U can do some introduction process by putting them in different cage and let them scene their smells and after that exchange bedding and etc...

If u wan buy in pair, is best to buy them with same sibling.. I have 2 Roborovski hamsters & 4 Winter White hamsters..

2 winter white hamster was same siblings together and they stay at the same cage.. After that i lend to my gf Mickey for 2days only cause she wana play with it.. After when i brought back Mickey and put them together, they tend to fight.. and i asked forumers here, they say that my hamsters already forgot each other scene of smell and that why they get scared.. Tried intro back together but failed.. So meanwhile i put Mickey at a small container cause i no cage for him..

Now bought a new cage, he is living inside..