getting started with CNCs

I am new to CNCs and new to this group, and I want to know where's the best
place to start with CNCs.
I have a fair amount of knowledge in electronics, as I used to program
microcontrollers.

What is the easiest software to begin with?
How can we convert .DXF files to G-codes and then send it to the PC parallel
port?
Do CAM softwares include all of that in one package?

Please, I need all the help I can get.

Thanks in advance.