I’m a Mac user and want to learn how to create my own designs, but there’s a large learning curve and I don’t have a lot of spare time. From the 3 free offerings that I’ve found (so far) Fusion 360 looks to be the best? I tried Blender, but couldn’t do anything with that software, seemed too much like a PC program to me. Any thoughts or suggestions? Also, I’m trying to design a very simple sleeve/shim for my 8020 profile (essentially a square tube) so I can slide the support pieces into an existing steal tube. Any help would be much appreciated.