We have a 7 month old Border Terrier, Gylly, he is awesome as you can see, so well done on selecting a Border T!
1st and 2nd night he cried quite a bit and for the 1st two night, yes we did give in a little bit. We didn’t spend any time with him in the night, just reassured him we were there. Come night 3 we decided it was time to toughen up and ignored him. The barking did stop. He now does not bark/cry at night at all. Ok he does bark if he hears something outside. So yes, be tough and do not spend time with them at night.
We left some of our clothes with him in his crate.
To be honest you biggest challeneg is going to be the biting of you she will do with her razor sharp teeth!
Happy to share border care tips if needed having just been through 7 months of Border growth!