Great Dane help !!

Erika

So we recently got a fur baby she’s 5 months and she the sweetest most laziest dog , but we can not get her to go potty outside! We take her every hour and all she does eat grass or sniff and then just plop down . And once we take her back she will have an accident inside 😩😩 any one own a Great Dane that could give me some type of advice