AutoCAD Drawing create STEP files only

I have drawings in AutoCAD. These drawing I have to give for 3D Prints. There are 13 drawing in AutoCAD. The drawings are fully complete. I want to optimize (to check if these drawing are good for 3D printing) these drawing for 3D print or Injection molding manufacturing. To have the 3D Prints of this parts I want to convert it to STEP file, and I wanted someone to do this for me.