This is just my 4 part series on it, Be sure to watch the whole video series through, Also, you don't always need to build like this, but this is the easiest way i found to since i didn't use fine tuner AT ALL and no nudging, so this works for iOS Users too.

(https://youtu.be/6VpqIJzbeGM)
(https://youtu.be/mLAHR18vqGI)
(https://youtu.be/C5hhsPff0W8)
(https//youtu.be/W3Wdl0amHRI)

[1-4 From top to Bottom]

Tips

ALWAYS use Fuselages, And for the Tank skeleton make sure to make all the corners .25 Width and Height, Length is at your discretion. Skeleton joints are cubes, you can rotate the cubes after putting the primary cockpit on the whole part which is connected to the cube, flip it and you can expand in any direction, you don't need to make a new fuselage block.

It's also not perfect, but it gets the job done, maybe you can tune a few things here and there, but it's generally whipped up in 20 minutes tops.