Join our CAD community forums where over 25,000 users interact to solve day to day problems and share ideas. We encourage you to visit, invite you to participate and look forward to your input and opinions. Acrobat 3D, AutoCAD, Catia, Inventor, IronCAD, Creo, Pro/ENGINEER, Solid Edge, SolidWorks, and others.
just look around and model something in your environment. A desk is a simple part to start with. How about a coffee cup, or a telephone, or your computer. After you've copied some parts, try to design your own desk, cup, phone, etc.