Here is the care info for russians. It explains the heating and lighting, substrate, soaking, diet, etc… Please give these a read through.
https://tortoiseforum.org/threads/beginner-mistakes.45180/
https://tortoiseforum.org/threads/russian-tortoise-care-sheet.80698/
https://tortoiseforum.org/threads/beginner-mistakes.45180/
https://tortoiseforum.org/threads/russian-tortoise-care-sheet.80698/