Good advice above.  I built two aircraft so far.  The jet fuselage/wings was made from a single cube.

(In the chant voice of the worms in the locker on MIB... "All Hail the Cube".)  ... If you make a cube correctly and adjust the points, you get a sphere like the earth.  Hence the flat earth society.  But I digress.

There is some extrusion and point welding, but the fuselage is organic looking and is a cube.  I'm sure you can do this in blender.