The biggest part is getting the right mold and learning how to use it properly. Then you have to learn what size wire works best with the size bait your wanting to make.
Here is a list of what you'll need to get started.
mold
wire
wire forming tool(s)
components...skirt material,blades,swivels,split rings,hooks and paint or powdercoat.
I'll be more than happy to go in to more detail later but now it's time to go fishing!!