The composition is a bit unsettling but the overall painting is decent for an afternoon.
Step 1: Outline and block in composition
Step 2: Add darkest darks and detail to test effect
Step 3: Continue detail of all objects
Step 4: Add background
This procedure may not be viewed as mature, as working in a general to specific manner is quicker and much less stressful with regard to proportions. However, experimenting with the process is fun and I like how this turned out.