Did you see the tutorials I posted above?
Here is the first of five videos “How to learn Fusion 360 CAM – Basic – Chapter 1”
He does a nice job of going over the basics.
Fusion 360 is a feature filled, professional CAD suite but it has a very steep learning curve. I did a lot of guessing and trial and error to get through the CAM workflow. For example in a sequence of 2D Facing, 3D Adaptive Clearing and 3D Parallel, I am still not sure how I was able to select the correct geometry so that one operation would not redo milling of areas that the previous operation already took care of. I kind of randomly found selections that worked.
Let me know what you have tried and maybe I can help.