That exporting an svg from Illustrator and dropping into Fusion as a sketch is not a very wise approach - the scale is completely off! DXF is the way to go, keep your units in mm across the workflow.

I've not used any CAD tools in a significant way in nearly three decades - all very familiar and yet not at the same time. Form-Z and ArchiCAD were my bread and butter back then, despised AutoCAD but here I am back in the Autodesk realm again with Fusion :-(