I am trying to put this as thoughtfully as I can, as I understand folks go through changes and must rehome pets sometimes.
You have already received some great info here and there isn't more I can add as far as resources to rehome your dog.
I do, however, have a big problem with the phrase "getting rid of."
It implies that pets are disposable. It breaks my heart because these little guys depend on us to care for them. If we can't, for whatever reason, honor our commitment, we REHOME them in a responsible way. Which is what you are doing.
Please know I am not bashing you at all. I am just trying, in my own small way, to change the way animals are treated and trying to keep the homeless population down. Words can hurt.
Good luck, I hope with all my heart you are successful.
Mom to the late Cyrus the Fluffweiler CGC forever in my heart and James the Alpha cat