A CNC (Computer Numeric Control) needs a set of instructions to the computer on how it needs to move to accomplish what you what it to. You would model something or import it from another program in the design workspace. You then need to switch to the Manufacture workspace.
Create a setup based on you stock or operation.
Create operations that will remove your stock to get to your modeled shape (face, adaptive, etc.)
The operations are machine independent meaning fusion does not know what kind of machine you have and fusion's toolpaths are only based off of the work offset you have set in Fusion. This may be where you are getting lost. You need a translator (post processor) to get it to work specifically with your controller (notice I said controller and not machine), since some machines can have different controllers (like a DMG DMU 50).
So Fusion>Post processor>G code file. That g code file will be on the computer that fusion is on. In your case you would copy that G code file to a USB drive and physically that that drive to you CNC controller and plug it in and copy the file from your USB to your CNC machine controller. The program is only run from your CNC controller.
***If you are that new to Fusion I would suggest clicking the help button in the upper right of your fusion screen and going through the Learning Panel and Learning and Help section.
There is also the CAM samples in the Data panel explorer.
The other resources I would suggest is Titans of CNC, that should walk you through simple modeling and the CNC portion of the program. That includes posting out your program and transfering it to the CNC controller, though it will be a Haas controller in that case but is the same for pretty much any controller.***
Once you know a little more you can go through some of the John Saunders NYCCNC and Lars Christensen on Youtube where they provide more detailed examples of things.
Fusion
