How to draw the indoor hand-painted effect?

Step 1: Type the manuscript with a water-based pen (parents without art background can type the manuscript with a pencil first)

Step 2: Draw from the dark with a marker.

Step 3: Grey surface.

Step 4: mix water-soluble colored lead to enhance the effect.

Step 5: Integrate the whole picture and strengthen the parts appropriately.

A simple hand-drawing is completed!