Congrats on your new puppy she is a doll baby.. and welcome to YT.. wonderful people, lots of good advice.
As far as the rabies goes, I guess it depends on where you live and who you ask.
Ive always had my dogs done before they were 6 months old. Usually right before they are fixed. MY toy poodle had her's at 5 months old and she was barely 2 pounds and she did fine. However it does cause some major issues with some dogs so if you feel better waiting then do that, talk to your vet he/she may be able to help when to schedule it. Also Ive read on this forum that if you give the pup a dose of childrens bendryl before the vax that it helps with a reaction.