I am thinking about getting a Russian Tortoise. What would I be getting myself into exactly? I have keep a RTB for about a year, I know its a far cry from a tortoise.

I have read a few care sheets. I am mostly wondering about a pen.
Should I keep them in the same pen for their life? Or go up in size as it grows?
Could I keep it outside during the say and move it inside at night?

What are some other tips that you have learned from keeping tortoises that the care sheets dont tell you?