Tips for your final sketch.

Isometric

Fill up A4 paper with product.

Put 6 Design Specs around the product (just a few words each).

Draw the material thickness proportionally (keep in mind if you're using 3, 6, 9, 12, 15, 18, or 24 mm)

Draw joints and annotate them.

Annotate anything that needs it (hinges, motion points, materials, hidden parts, etc).

Where multiple layers are present, show these and annotate.

Show screws and nails. If covered in laminate, annotate the screws.