What's current training for Russian armor crews/how do they replenish their losses?

Being following the war since day 1.

I noticed most discussions are focusing on hardware losses, but I am more curious about human side. With the massive crew losses Russia suffered past few years, what's the current system look like?

1. How's their training system look like right now? Have they shorten they training course for armor crewmen?

2. Do they still train in company or higher combined arms? Cross train between crew stations?

3. How many tank or IFV crews are Russian producing currently? Have they opened new armor schools to increase output?

4. How many pre-war professional crews still left? In the frontline, how many veteran vs new recruits? Or have they pulled most veteran back to interior as instructors?