Your level of expertise will be the first criteria you will need to take into account while choosing your 3D program! Even when it comes to free CAD software, you can find really complex and technical programs. Are you a beginner, intermediate or advanced user? Some software can really be difficult to use, with a lot of different features and complex interface. You can find programs for every level of experience. In order to make the best choice possible, you will have to ask yourself the good questions. There is a lot of CAD programs available on the market and you might be a bit lost.