3D Start Parts Catia

Hy everybody, I'm new in Catia 3DXperience. I'm trying to make my 3d templates files for parts, assemblies and drafting; but I'm not able to save as template in 3DX. I have read in some post that a TER role is needed (I don't have it, I only have Mechanical Design role). Is it that correct? How can I obtain this role? I take a look in online store but there is a package for Mechanical design but I don't see anywhere where roles are offered.

At this point I only want a seed files to start a design with Catia; I'm not sure if for that simple template this role is required.

Thanks in advance.