How to make a custom Jbeam and model?

So I am making a mod, and I am wondering how you make a custom model and j beam?
Yes, I know I am being ambitious

 

for the model u can use blender for the jbeam i think its in notebook

 

For making a model, you will need to learn Blender/3DS Max/Maya etc., but that will take months to become good at it. After that, you will also have to learn how to texture, which means you will need to learn how to use GIMP/Photoshop/Paint.net etc.

As for jbeam, using the Notepad++ is a good start

 

basically it takes like a full year to learn everything. Don't make a mod now because its gonna be crap without learning the proper techniques.