Have fun!
I didn't answer one specific question you had, about how to get her attention. You'll probably find she's very aware of you and where you are, but if not, you can tap her lightly on the shoulder (if nearby), or if you're across the table, say, you can wave your hand around a bit (she'll likely look up to see what the fuss is about -- deaf babies are more attuned to movement than hearing babies). The American Deaf handwave is to extend your arm, palm down, and move your hand up and down. We all do that in my house, even though I'm the only one who's deaf, and my daughter (age 5) still hasn't quite figured out the hearing ways of getting attention -- clearing throat, starting to say something when there's a break in the flow of conversation, etc. She'll frequently be waving at hearing people who don't notice her at all.