I want to re-home my moms dog
What makes you think that the dog needs a new home?
It's not misbehaving at all, I just want to re-home it because I don't like it.
That is not a good reason to try to rehome a dog! It's your mother's dog not yours so it's up to her if she feels it needs a new place to live.
I'm a kid. I don't need to do what other people tell me
As a child, you do need to listen to your parents. You have no business making decisions for your mother. If you have a complaint about the dog talk to her and let her make the decision.