OOOhhh massive congratulations! My DD has 2 boy's aged 3 years and 10 months. I adore them.They live round the corner from me I'm so lucky.
I'm very close to my DD she's a wonderful mother I never judge my DD or DSIL parenting skill's. I know they are doing the job as best they can and they adore thier son's.
My best advise would be to smile when you visit hold the baby when offered, or ask if it's ok to pick him up. (Both of my grandsons had bad reflux). Listen to what your daughter has to say. I think sometimes when you are pregnant or just had a baby it's good to have someone who will just listen to you.
We also love face time, even my little GS who's only just 3 knows how to face time me if get's hold of his mum's phone he'll call me just to ask if I'm coming to see him, or my favorite "Nanny I've just done a poo"
I'm sure your be a fab Granny,Gran, Nanny, Nan, Nana, Grandma, Grandmother that was the had part for me what do they call me! I'm Nanny just like my Mother was to my children! x