You can definitely replicate the traditional method. It could help to use a more "traditional" based digital program, such as Rebelle 5 Pro, or Corel Painter. However, it's not strictly necessary. You can set up your digital drawing pen (I'm assuming you will use something like a wacom if on a pc, or an apple pencil if on an ipad) so the brush thickness will increase when you tilt the pen. This make sit behave similar to a real pencil... wider when you hold it more flat, and sharp and pointed when you hold the pencil more upright.