I'm not an expert and never had any other pet reptiles besides torts. I'll share what I know just in case is helpful. My enclosures are kind of home made. It depends on where you live geographically and the weather -that's vital for the tortoise health. I'm in area of CA that gets warm in the summers although cold and rainy in winter (no snow).
I suggest you buy books about tortoises and learn about your pet's needs (specific for the species). I have "Turtles and Tortoises for Dummies" and a couple of other books that I bought at a pet shop and a bookstore. The internet and this forum are great resources too.
Also to be prepared for emergencies, find a vet in your area that specializes in reptiles and has experience treating turtles. Don't hesitate to call him/her if there's questions/concerns.
Now about Toto's enclosures: The outdoor one -for summer only- is a wooden rectangle made of a converted boxspring. It has a border all around on the top to provide shelter when he is too hot, and also a little hiding box. This structure is on top of a cement floor, so he can't dig out of it, and it can be moved for a sunny spot (my back yard is very shady because of trees). The trees shed lots of leaves/twigs that naturally fall in there, so that would be the substrate (he doesn't eat them). Then I put the food in a little flat dish and also a top of an old marmelade jar acts as a shallow water dish. It's important that you give him/her the right calcium and vitamins supplements. I got these at the place where I got him, East Bay Vivarium (Berkeley, CA).
If the weather is not hot enough he goes inside the house where he has an enclosure with a UV lamp to provide artificial sunlight, a heat lamp for warmth and a heating pad (under the bottom of the enclosure so he doesn't get burned), an igloo (bought at a pet store), two empty cereal boxes where he hides, and also food and water.
When he was a baby he was in a pet store bought terrarium with the same lamps and heating pads, a "house" (made with a plastic flower pot in which I cut a "door"
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It's also IMPORTANT for "tortuhealth": soaks/baths in warm water. As a baby he was soaked every day, now once a week or as needed.
Best wishes with your new tort,
TT