People new to CAD will want to start with Autodesk Tinkercad, a web-based program that's free to sign up for and use. Click Create a Personal Account to get started.
You can use the built-in tutorials to learn how to build objects out of primitive shapes and negative spaces, and even import your own custom shapes drawn as black and white .SVG (Scalable Vector Graphic) files.
![](https://d2jv02qf7xgjwx.cloudfront.net/accounts/144584/images/Tinkercad.PNG)
The SVG technique can be especially powerful because it allows you to bring in text, QR codes, logo drawings - anything 2D can be made 3D! Websites like convertio.co will change your black and white .png or .jpg images into .SVG files for free.
Experiment with Tinkercad's tools and you'll be surprised by how much you can achieve!