Is it easy to change a dog’s name?

Hello, everyone. I will be getting a dog in the near future. It will not be a puppy and therefore accustomed to its already assigned name.

I want to change it. We are expecting to have the dog by the time he is between 10 and 11 months old.

1. Is it easy to change a dog’s name?

2. How do I go about doing this?

3. Is it worth going through the hassle of a name change?