Of course!
Nolan became like the set of keys Clara stole every night, only it was a more gradual process for him. So Clara lives in one reality, or dimension. We live in another. Nolan started out in our reality, and in the end, he essentially split: Nolan A stayed in our reality and went to Canada. Nolan B crossed over into Clara’s reality and became just like her.
Does that help? Thanks so much fore reading!