Welcome to ratty world!
Ive been owned by ratties for 6 years now and I can't remember life without them! I keep bucks and I show them also
That cage is fine for a pair of girlies. Shove them down your hoody and walk around with them, hearing your heart and the warmth helps for taming and bonding
I echo what the others have said, feel free to ask as many questions as you like and good luck with the newbies, looking forward to seeing them