Depends what you want to create. Organic models, mechanical parts, huge assemblies, symmulations, how complex etc.
If you need 3D modeling - blender, but you need 3D CAD modeling software I guess. Im not daily fusion user, but I was playing around with it. Im using solidworks and there is nothing available on linux that is good enough for my needs unfortunately. Thats why I dual boot shitdows... Someone said fusion can work under proton, that sounds good, Id try that. If that doesnt work for you I think freeCAD is your best bet.
And yeah Cura works on linux 🥰