In 3D printing the only way better for you to get better at desiging is to start by crawling and slowly advancing your skills thats why we have choosen to use 2 catergories for our favored recommended design software
3D Beginner Design Software
This is for people who are starting out and learning to design or for kids who would like to design their own objects
Microsoft 3D builder
TinkerCAD
Auto CAD/CAM
This is for more complex and advanced designs also having many for features and nifty gadgets to learn and play with
Auto CAD /CAM