As far as I know, it's quite the same as the russian handwriting. I hope, for a native Russian speaker like you, it'd be helpful. I'm not aware of any difference, but even if there are some, I think they are negligible, compared to how diverse the personal handwritings could be. Of course, it's worth mentioning that the bulgarian alphabet doesn't contain the letters: "Ё","Ы","Э" at all ..... if that counts as a difference. :)