I'm not a traditional politician, and I have a sense of humor. I'll try to soften it and become boring, maybe even very boring, but I'm not sure if I'll be able to.

This quote means that the speaker is not a typical politician, and they often like to joke around. However, they are trying to act more professional and be less humorous in order to fit in better, but they are not sure if they will be able to change their personality enough to become more serious.