Your first night in your new place, look how far you have come Perse, that's really amazing.
I think one of the toughest things is not knowing how you will feel and just "be" in your new surroundings/situation. That's ok, it is actually going to be fine it just takes (as is said here often) time!
Having a child or children to address as well makes it even harder, of course, but as Firesprite so wisely said, just getting the moving done and getting everyone fed is sometimes enough.
It's hard, this whole thing for you has been hard and I hope you realize the courage you have in carrying through. I hope the move goes really well today and you can sit down tonight in your new, peaceful place and have a sigh of relief.
Again, it will take time to adjust but I hope you do feel that peacefulness today.
Please let us know how it goes.