As I was taking picture of my model, turning it around, I realise that my SD changed to D at a view. So here are my mistakes, and how I can refine it.

Just by the front view, D, SD & SO looks ok.

When I turn to the top view, my D (which is my red box) changed to SD. Hence, Syadza, my classmate, suggest that I cut the foam to make it thinner.

Below are images of my final model using foam. I didn’t reuse the red box because I wanted to pierce my SD into it and the red box stinks for some reasons.

Next, I’m going to do a moodboard of the material/look & feel of my model. Then go down to Art Friend or Daiso (because cheaper) to find for material.