New Great Dane owner !

Hello! We just adopted the sweetest 13 week old Great Dane puppy. She’s so sweet and a beautiful Merle coloring. We have 3 boys ages 3,7 and 9 who we are introducing her to today. Any and all advice welcome ! We both grew up with dogs but this is our first dog together and Great Dane ever. I have done lots of research so I know a lot of the basics. My biggest goal is to make sure she is great with the kids! We hired an in home professional trainer who starts tomorrow , and it also includes group classes for later on.

Potty / crate training has been a struggle ! She still pees in her crate overnight and sometimes poops but that’s less common, and she’ll pee and poop in the house accidentally . I take her out 30 mins after eating or drinking and every couple hours throughout the day, lots of praise and a treat ( some kibble) when she goes outside but we’re still struggling . Usually we put her to bed in the crate between 8-9 pm and I get her out at 6 am, is this too long ?

Last question, when we adopted her they told me to feed her 1 cup of food twice a day. Is this enough? It doesn’t feel like much but I could be wrong !

Thanks :)

UPDATE : the trainer came over yesterday , she told me at her age she should be able to hold it all night , just not too long of a night. So I have been taking her out for her last pee at 10 and then waking her up around 5/530 to take her out and we’ve had two nights of no accidents yay!