Welcome!

I would recommend what worked for me: give it more time and establish a consistent routine.

Our lab Oreo joined our family when she was already a year old, too, and it took her about a week before she adjusted to sleeping in the house and through the night. At first we tried a hard-sided crate, but she became very agitated about not being able to see out. So we switched to an open, wire playpen with her bed inside. She likes to have her own secure area (that she doesn't have to share with the cat), and she can still see all around.

When she would wake up and whine, we'd comfort her in a soft voice, but we'd not get up or let her out of bed. She settled down once she started feeling more secure and got used to the new routine. For her this took about a week, but every dog is different.

Good luck!