I'd advise against this. Stuttering aside, acting is meant to tap into your authentic experience and use those emotions and understandings to add depth to a character. You do not currently have a speech dysfluency (if I'm reading the post correctly?) so couldn't really portray that authentically. I'd interrogate what you want to achieve with adding a stutter, and see if there is a way you can achieve that without attempting to replicate an issue you don't actually experience. (I know there are actors who do replicate issues, which runs the spectrum from fine to terrible - however, actors that do this well are highly trained and working with researchers often. Just on your own, not too sure it'd chime right)