Welcome to the forum. There are as many ways to make an enclosure as there tortoises. A bit more information will help us point you in the right direction.
Russians need large enclosures. Outside is best. If it is too cold and you have to keep him inside large bookcases or dressers with the shelves and drawers removed, and laid on their back works. Multiple large storage tubs can also be connected to make a nice enclosure.