Hello, do not take this the wrong way, but I think you should change the model!
I do not want to penalize your skills but it is ugly, stumps heterogeneous elements, nose, fuselage, cockpit, are different in structure, you should use the same type of structure for each element (eg, insert a polygon ovoid of a polygon is Platonic good but not a polygon with a Platonic cuboid).
is your first job with the 3D true?
But if you do not, you could start by eliminating the curved line under the nose of the pilot;
Reshape their wings in a triangular shape and attach the short side and reduce them drastically.
About you based on the model of corrupting it?