Halloween // Using 3d printing for silicone mask

So I am trying to start early on the Halloween mask making and want to use my 3d printer for a silicone mask. But I have no clue what I am doing, in the past years I used burlap and other materials to harden and sculpt it but I want to move onto silicone this year. My problem is that I want to design the mask on my computer then 3d print it then cast it with silicone and wear it but I have no clue how to do that process. Does anyone have any experience in that area or should I just try to do it the traditional way?