Sounds normal to me. My bun is spayed and loves to dig. She will dig for fun, dig to tell me shes mad, dig when bored, and dig for whatever reason i’m not aware of. She loves to dig. Unlike your bun, she wont nip or dig my bare skin. But if i’m wearing clothes over the skin, she’ll dig like crazy. I have to make arrangements so that she doesn’t dig on carpet (e.g., restricting areas).
As for saying no, it doesn’t mean anything to animals. The word “NO” is really a human construct and has no inherent meaning. So bunnies and other animals don’t know what “no” means. Its the action that is paired with no (e.g., the consequences), that allow people to learn the meaning.
Now you might argue that other animals respond to “no.” Technically, they are responding to “no” because of what it is paired with such as a Loud NO! (aversive stimulus), or with the thing that follows no (e.g., punishment)