Sickly one way to look at making models it to imagine that you have a big block of clay in front of you, you cut bits away until you end up with something like you want this would be how the car companies would do.
Or the big trick is not really the shape, its the textureing.
for example:
say you want to make a crate, you've seen lots of ways in the forum, However the big trick is could you take a cube and make the texture look like a crate.
When you have the skills to do that then any item is possible.
So find the model and paint package that you can work with, then mess about with them until you can make any shape and texture you want in a few clicks and work form there.
sorry there no fast track.
Dark Physics makes any hot drink go cold.
