FreeCAD has some advanced capabilities but is not a great package to start on. I've created some weird shapes in it but would never have been able to do it if

FreeCAD has some advanced capabilities but is not a great package to start on. I've created some weird shapes in it but would never have been able to do it if it were not for a fair amount of SolidWorks experience. You might try using OnShape, where everything is stored in the cloud. I haven't tried it yet but it seems to be made by the same people who did SolidWorks. They probably have good tutorials. If you get over a learning curve there you might be better prepared to do things on FreeCad offline.