I'm not familiar with Jungle Ground bedding. However, if it is not digestible, I wouldn't use it. Impaction is a major cause for tortoise mortality. I always kept mine on Purina Rabbit pellets. That way if they ingested any, it was good for them. It's also like clumping cat litter when it gets wet.
For night time, I recommend using a ceramic heat bulb. They emit only heat, no light, so you can use them around the clock without disturbing the light cycle. What's more, they use much less electricity and last far longer than heat lamps. They are also much less fragile.
Turnip, mustard and collard greens are three of the best (commonly available) foods for most herps. Wild Dandelions and Plantains (the weed, not the banana) are even better. I'd grow them in large organic areas for my torts. Those greens have the most favorable Calcium to Phosporus ratio which is very important. A weekly sprinkle of any herp vitamin is a great additon. Don't let any green get too wilted, in some it can cause toxins to form. Replace the food twice/day and don't leave it in overnight. Here is a table for the relative nutrition of most foods in relation to their suitability for tortoises: Nutrient Analysis of Replacement Turtle and Tortoise Foods
Here is a site dedicated to rasing young tortoise hatchlings, it should answer most of your questions. Darrell Senneke is one of the best authorities out there on raising young tortioses. Hatchling Haven
I loved my Russian's, when I was home they had the run of my house ...and they always found there way to the kitchen for feedings. I think they are among the smartest of the tortoises. While they do need water and an occasional soak, it's very important that you keep the overall humidity low for them.
In some parts of their range, they may aestivate as much as nine months out of the year. For this reason, when they are awake, they (should) have a great urge to eat. Mine were major chow hounds. I wouldn't recommend trying to induce hibernation in one so young, or until you've got a few years of keeping under your belt. It won't hurt them to stay awake for a couple of years or so.