Thats awesome...i also have jumped in feet first and have two baby girl littermates. We are separating them some now because they are babies and are bonding too much with each other and not as much with us as we would like. You shouldnt have that issue however I would give the new one special time with you away from the otber to create a good bond to you without neglecting the other sweetheart.
Congrats. I like the advice of not overthinking it. It will all work out.
