You will find that there is a fairly steep learning curve to Fusion and other 3D modeling CAD. I started drafting almost sixty years ago and had used it extensively until the late 1990's. Then I started using a CAD program called AutoSketch, followed by AutoCAD LT. AutoCAD was particularly difficult at first as to really use it, you had to know all the secret commands that were entered on the command line. Having a good reference book made the difference.
I moved on to SolidWorks in 2004 and again, it was frustrating to grasp enough of the fundamentals to be able to work effectively. I have been using SolidWorks for 17 years now and own my own personal seat. I would never consider going back to pencil and paper. Contrary to what is said above, I can quickly make a solid model to solidify an idea. The model can be stretched, or features deleted and new features added to modify the initial thoughts with a few clicks of a mouse or keystrokes. When I am done, I have a solid model that shows me exactly what I will have when I am finished in the machine shop. I know precisely where every hole is located, what are the potential interferences,
I have Fusion 360 loaded on my computer. I loaded it a number of years ago when they first introduced it. It was introduced as a "free forever" for entrepreneurs, educators, and hobbyists, professional quality CAD program. In spite of already having a quality CAD program, I was interested in it for several reasons. The first being that it was a "free forever" stable and quality program and another reason was that it included an integral CAM program for generating CNC machining programs.
I have to say that I haven't dove into Fusion in all these years. The primary reason is that I already have a practical alternative. The biggest reason being that I haven't taken the time to learn all the secret keystrokes necessary to access the extensive features. I have played with it a little, and created some models but just not used it enough to commit to memory what needs to be done to proficiently use the program. Last winter, I decided to put the effort onto learning how to use the program. For me, that would require putting in a week or two of total immersion. Other things got in the way and the decision by Autodesk to downgrade the "free forever" version killed that. Maybe this year?
All that said, I wouldn't be without some sort of solid modeling program. Be it SolidWorks, Fusion, FreeCad or some other. They are powerful tools for a machinist. Virtually everything I make in the shop is preceded by a SolidWorks model. There are tasks that can be accomplished in CAD that would be impossible otherwise. Complex sheet metal parts can be modeled and then flattened to show exactly what the profile is and where the bend lines are. I have used SolidWorks for landscaping layout, for extensive construction projects, and for electronics layout as well as simply answering questions that arise on this forum.