Hi! Welcome! You've gotten a lot of great advice here. If you have an area for her, a bed or crate, make sure the kids know this is off limits to them, that when she is there she is not to be disturbed. This will give her a "safe" place to be when she needs to rest or get away to regroup. I'll just restate, give her time, let her initiate most of the interaction at first. It's ok for ya'll to do some of the initiation, but let her see that she can say no, or stop if she's had enough. At first have your children sit quietly on the floor with a few treats and let her come to them. The hardest thing I had to teach my nephews was that the HUGS they wanted to give really scared Sadie & Annie. Once they got past that the dogs were more comfortable and everyone got along great.
You'll find
your best time with her will be early in the morning or later at night while the kids are in bed. Basically do the same thing, just sit quietly with a few treats and let her come to you. Talk in a normal voice, no sudden movements and she'll come around.
And I'm a firm believer in actually telling them things. How much ya'll love her, how YOU are the lucky ones to have her in your family. How beautiful and smart she is. Just go on and on about what ya'll are doing that day, or what happened while you were out. I know it seems silly, but I really see a difference when I 'converse' with them.
Post pictures when you can, I'm excited to see her.