Just read your thread. Glad you got your tortoise! She is very cute.
Just a few things I learned with my 4. Have had them 5years now. One is a definite male lol. The other 4 I think are going to be girls.
They are much hardier than we think. They do best if left in a natural outdoor setting. I live in Luxembourg now so we don't really have hot weather, except for summer. Today it was about 15C for example and they were chilling around their garden. At night it gets cold and they bury and chill. Tortoises are made to be in fluctuating temps. The heat will make them active and eat, and the cold will tell their bodies to sleep and not eat as much. Their metabolism will adapt don't worry. They don't get 'colds' or whatnot. This is natural for them. My 4 have also hibernated every single winter. The one year olds for 3 months and I add an extra month each year. My babies were 25grams when they did their first hibernation. It's TOTALLY natural for them. I know it is stressful, but for them it is much more stressful and harmful if you deny this to them. My breeder friend in Germany hibernates babies that just hatched a few weeks before. It's what they do in the wild too.
Seeing the size and weight of your girl she is already on her 2nd year right? She defiantly should hibernate. The health issues that come when they don't really isn't something nice. Especially since it doesn't look like she was hibernated last winter.
I don't put mine in the fridge tho. I keep them outside in their little greenhouse with very deep soil and they just bury themselves in there and come out in spring. The babies, I dig them up after 3months and let them live in the house until spring. If you live in a very cold area you can just put a heating lamp in the little greenhouse and it keeps the ground from freezing. That's the only risk. The rest is all normal.
Be careful also that she doesn't gain too much weight too fast. She is already older so shouldn't be doubling weight in only a few months. Stick to wild greens and not so much veggies and stuff. I plant a mix called 'T-Lady tortoise mix' in some pots and that's what they get. Some is also planted in their enclosure. They have food at will 24/7, but they regulate how much they want themselves.
Her colors will also change as soon as she is kept outside. My first tortoise I got from a pet store had the same colouring as her. Because he had never lived outside. The others I got from breeders in Germany who had lived outside all their lives were a much duller coloration. Because the sun lightens their colours.
Eventually she will learn her name and come when you call her. I never am afraid of losing my little ones as they all come when called. I always give them a little treat when they do
Good luck with her.