Choose a model for the question you want to answer.
Planar heads, anatomical models and classical fragments offer different starting points for a drawing practice.
For your deskYour recent sketches and one specific thing you want to practise.
For light and facial structure: a planar head
If portrait shading feels like a collection of patches, a head built from simplified planes is a useful place to begin. It gives you clear surfaces to compare as you move a lamp around the model.
Start with broad value studies and a few viewing angles. Ask where the front turns into the side, how the brow sits over the eye area, and what happens to the jaw when the light moves. You can explore these questions without first resolving every small facial detail.
For a difficult body part: an anatomy study
A hand, arm or foot model lets you spend time on a small part of the figure. Choose a reference whose visible forms answer your question: gesture, overlapping shapes, or the relationship between a surface and the structure beneath it.
Use the product’s gallery to check the available views and the pose. A fixed sculpture is a reference for that particular pose; it does not demonstrate the full range of motion of a living joint. Combine it with observation from life when you want to study movement.
For close observation: a classical fragment
An eye, ear or torso offers a contained subject for longer work. With fewer things competing for your attention, you can compare small changes of contour, negative space and reflected light.
Pick one feature and make a measured drawing before adding tone. Return to it under different lighting. A repeated subject makes it easier to notice changes in how you observe rather than having to learn a completely new setup each time.
Choose for your actual workspace
Check dimensions, material, finish and the selected variant before ordering. Think about where the model will sit, whether you can view it near eye level, and whether there is room to position a lamp beside it.
The most useful reference is one you can keep returning to. Start with the model that addresses your present difficulty and give yourself a small repeatable exercise. Add another subject when you have a new question to investigate.