New to this Group and new to CNC machine operations!

Hello all! I have a serious question. I want to machine aluminum
into a mold for a plastic injection machine. The molds will be for
small parts used in Z scale model railroad applications. I have no
experience with either CNC operations or milling machine operations
or plastic injection machinery operations.

I have it within me to learn quick, but I would like to propose this
question to all. What type of CNC milling machine set up would be
the best for the above mentioned operation? Please elaborate on
every detail. Thank you!

Tim