If anyone can help me with the below:
1. I have been scheduled for the oath and it says the time (9 am Atlantic time). Is Toronto time the same?
2. I have a newborn and I can’t really be away from her for the duration of the oath. Is it ok to keep her nearby? Or in my arms?
9am Atlantic would be 8am Eastern. Did you move to Toronto? Weird they'd send Atlantic time.
Re your baby, congratulations! It should not be a problem. Just have everything they'll need for ~3hs right by you as you'll need to be on video and if possible have another adult there that can help if the baby gets fussy or needs a change.