The next edges i'll extrude are highlighted.
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Extruded...
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Now I've extruded a face from the selected edge this will form a part of the nose and here's another Mesh update BaseMesh 5
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I've extruded the edges shown here.
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Next I've extruded the four highlighted edges.
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Next extruded the five edges at the bottom.
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Using the split polygon tool I've cut the faces here. And here's a mesh update BaseMesh 6.
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I've selected these edges then extruded.
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Just merge the edge here. Mesh update BaseMesh 7.
Extrude edges at the top.
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Now at the bottom.
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Extrude from the selected edges.
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Select the 3 edges at the back here and extrude again.
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Extrude the same edges.
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More 3D Graphics: 
