Hello and welcome to TFO. I've not done a baby Russian but you came to the site that can help you. I got my little guy when he was 5 years more or less. Your baby looks good to me.but the more experienced members can answer your questions better. As far as diet, humidity, etc...I'm just thinking you have a growing baby.I have a 3 month year old Russian tortoise captive breed. Is this normal or is this shell rot?View attachment 283017 View attachment 283015
Okay Thank youAre you talking about the little white lines throughout the shell? Do a 'search' for "White Squiggly Lines." We have several threads about this phenomenon.
https://tortoiseforum.org/forums/tortoise-faqs-new-and-need-help.133/