Chivalry Custom Content

Not entirely sure where to post this, but I would like to create custom content for the game Chivalry: Medieval Warfare, by custom content I mean new weapon skins, Armour and the like. Would anyone happen to know where I could start, I'm not familiar with 3D Modelling programs, so what should I do.

Just any pointers in general on what I could do would be handy.

Thank you :D

Found a link could be useful: