Kewl! My first exposure to 3D software was Autocad, followed by a few years spent with Solidworks. The learning curve is really steep because you have to think about what you want to create and define a space for it to exist in, unlike a 2D drawing program where you can start with a line and zoom in or out as needed. The time spent learning something like Blender is well worth it and the fact that it is free to use reinforces that; they can't take your skills once acquired by denying you access to the program as is the case with other software when the license runs out. Keep at it!