Can't really say if he's healthy, but he looks good. However, they substrate your using us not good. Switch it out for plain pesticide and fertilizer free dirt or coconut coir or a mixture of both. Deep enough for him to burrow down into.
He/she looks like a nice happy tortoise. Congratulations. I am not going to give any advice since I am new to this forum. By just wanted to say welcome, and Hi!
Chelsea
Your little russian looks good. Now lets keep it that way. You need new substrate, I use coco and tropiocal bark beding mixed together. Others use just coco or coco and sand or coco and planting dirt ( with out any chemicals or anything added just dirt). your tort needs a basking area and a cool area. I use a ceramic heater and a uvb light, now you need to change the uvb ever 6 months or so because the uvb wares out. As for food no fruits. I feed mine spring mix, kale, bok choy, cactus just to name a few. Now thats in the winter because up here in Alaska I only have about 5 months of good weather to get wild greens. DO not feel any kind of lettuce its just wather. You can also give alfala hay as ruffage every now and again. You need a good dish for soaking and drinking. People usualy use the cermaic bottoms of plant pots that can be foud about any where. The tank you have your in may stress him out because he think he can get out, but he cant. So untill you are able to change that put some black paper around it on the bottom so he cant see out. Change the water when it gets dirty. Wich happens alot. lol. Your going to want to use decholorinated water.. wich is easy to do. Fill a jug with your tap water let it sit out for 24 hrs and you have cholorene free water. I keep a few milk jugs on had filled with water. I hope that helps some! Good luck.