I bath my pup every week... some people say every other week... see what ya think. I have a area dryer I use to dry Chewy... But some use blow dryers. I swish the shampoo in the bath water instead of putting it on the pup...you don't want to dry their skin and it makes it easyer to rinse. I also use tearless shampoo..
I would start brushing now... I brush teeth every day. My baby puts up a huge fight with this...
I know my pup didn't eat a lot at one time... but he was peeing and pooping a lot so I knew he was getting enough... make sure they eat every few hours though... they can go into hypoglycemic shock if they don't eat often enough. Chewy had to be hand feed at times because he was picky and I would worry!!!
Best of Luck with the new pup!