1 & 4 are pretty good. I might crop the first one a little tighter, but that's just me...
#2, this is a difficult angle to make work and I just don't think it works here...
#3, the OOF foot in the foreground throws me off...
#5, just too underexposed. Baby is very dark, the white isn't "bright and cheery" like you would want white to be with a baby. Easy fix in Photoshop or Lightroom, but it's always best to try and get it right in camera I don't always get this either, I still have a LOT of practice before I can really consider myself perfect, but I do try to get it right in camera...
Not bad for your first! The lighting looks harsh to me, 1 and 4 are the ones I like best but would like to see softer lighting on that sweet skin. Congrats on getting the first newborn under your belt, you'll just keep getting better!