Hello! Welcome to BW and congratulations on your new baby girl! She's adorable!
Regarding your 3 questions..
1. It's ok to offer a pacifer now, it's not a prop at this age. At 2 weeks the sucking reflex is VERY strong in babies and they need it to soothe. I would prefer a thousand times you offer her the paci than your breasts in order to get her asleep. If you keep popping it in her mouth everytime it falls out when she's asleep then it will FOR SURE become a prop. Give it to her when she's first nodding off to help her soothe into sleep and leave it at that. If it falls out and she doesn't notice, then leave it out!
2. At 2 weeks there really is no activity to speak of. EASY and especially the A time doesn't really do much for babies under 6 weeks. It's great you have started now because it's getting YOU used to the motions of it and not starting any accidental parenting. For now all she will do is eat and sleep. And my advice to you is, ENJOY IT!! and also sleep tons yourself. Newborns are hard work and it will also do wonders for your supply. So for no, don't even worry or think about A time for her, the most you could get out of her right now would be 5-10 mins. And it's important she sleeps alot right now. To sleep is to grow at this stage. just make sure she eat when she's supposed to and the rest will come into paly when she's a little older.
3.At night you MUST skip acitivity. Like Mariek told you, keep it all low-key and with dimmed lights. No eye contact or talking. Babies don't know that night is for sleeping, they must be taught that. In fact many babies have it backwards because while you were pregnant she napped during the day while you moved and had a rocking effect on her, and she probably kicked up a storm while you were trying to sleep and she was no longer being rocked. So the message you want to send her is that nighttime is when things are dark, quiet and relaxing ie. this is when we sleep.
And yeah diaper her at night, if not she'll get upset. Just do it in sloooooow moootiooooon and as gently as possible. Also warm the wipes so they're not cold and may startle her
Let me know how you get on!
- Beca