How do you dress a newborn

Don't judge ftm here.

1. How do you dress baby in the hospital? What kind of outfits do you put on and when do you dress baby?

2. Do you put a onesie under every outfit?

3. Since I'm having a boy, do you always put a hat on? I see a lot of baby boys in the hospital wearing hats but now I'm being told no hats are bad.