Searching for “Fusion 360 full install version free” leads to:
Programming for 2-axis up to 5-axis CNC machining, turning, and additive manufacturing (3D printing). Simulation & Generative Design: autodesk fusion 360 full install version
This is the primary method for commercial users. If you have a paid subscription (monthly, yearly, or 3-year term): Searching for “Fusion 360 full install version free”
Fusion offers different versions depending on your use case: autodesk fusion 360 full install version