Hi there!
Welcome to YT!!
We are so glad you came to join us!
This is a perfectly fine section to post in and I can help you out with some of your answers and hopefully the ones I can't someone else will step in here and help you out!
I don't have any expierience with any groomers or obedience schools in NJ, but we do have a lot of NJ people here that I am sure could help you out. I did find one sight online that had some reviews of dog groomers in NJ but I don't know if it's close to your area or not...here's the link:
http://www.judysbook.com/members/536...006/11/485698/
As to a dog getting used to its new home, I'd say for each dog it's different. I have a two year old boy and an almost 5 month old girl. When I brought my boy him it took him about 2 weeks before he reall felt like "THIS" was his home. My girl on the other hand, I brought her home much sooner than I did my boy and she acted like she was in her home around day 2. Make sure you have a little area that is "hers" with a bed she can lay in, maybe a nice flannel blanket she can cuddle up with, some toys, make it familiar and try to keep it the same. Don't move things around too much in "her" area, let her get used to it and realize that, that is "her" place.
If you have anything from her previous home, a blankie, a toy, anything you can stick that in "her" place and it will bring a little bit of comfort to her if she is feeling a little home sick.
As to peeing and pooping, every yorkie is different, some potty train easily others and I would dare say most yorkies have a hard time being potty trained. If you are training her to go on pads inside you can block hre off in an area that is larege enough for her to play, eat and drink and have a section on the opposite side of where she sleeps/eats for her to go to the bathroom and you can put newspaper or pads down. After she eats bring her to the pad and tell her to go potty. If she goes off the pad pick her up again and put her back on the pad and tell her to go potty again. Once she finally goes give her LOTS of praise! It's ina dogs nature to want to please its owner so once she realizes you want her to go on the pad she should start responding to this. Another option of potty training is called crate training.
There is a great article on this here:
http://www.cuhumane.org/topics/crate.html
you can also search here on YT under the search button and type in "crate training" and a bunch of articles will come up.
As to the dentist, I actually prefer to use Petzlife oral care spray and gel on my dogs and brush their teeth daily. I've had Jadens teeth clean when I had him nuetered but due to the dangers that can arise from putting them under I prefer to just clean them myself. If your dog's teeth are healthy and you brush them and give them things to chew on that will help strengthen their teeth and work their gums you shouldn't have any problems.
This is what I use on Jaden and Jewelina daily:
http://www.petzlife.com/
It keeps their teeth sparkling white and it only takes about 4 minutes of my time to do both of them daily.
If you choose to get your little girl spayed, (depending on her size, some wait until they are a year, others around 6 months some wait even longer, it's all a personal preference but I've heard if you can do it before they go into heat, so long as your dog is big enough so that the surgery is as safe as it can be, the healthier it is for you little one.. My little girl is only 1 pound 11 ounces so I am waiting until she gets bigger before I spay her and hoping she will not go into heat before them) you could have her teeth cleaned then as she will already be put under for the surgery...
I hope this helps and if you have any more questions feel free to PM me anytime!
Joy