If you're new to 3D modeling and design, creating simple OBJ files can be a great starting point. The OBJ file format is widely used for 3D graphics and is compatible with many software applications. Here's a quick guide to help you create simple OBJ files:

1. Create Your 3D Model: Use a 3D modeling software such as Blender, Maya, or 3ds Max to create your 3D model. Keep the design simple to start with, as complex designs can result in large OBJ files.

2. Export as OBJ: Once your 3D model is ready, you can export it as an OBJ file from your 3D modeling software. Look for the export options in the software and choose OBJ as the file format.

3. Adjust Export Settings: Some 3D modeling software may offer export settings for OBJ files. You can adjust settings such as scale, texture coordinates, and normals based on your specific needs.

4. Check OBJ File: After exporting, it's a good practice to check the OBJ file using a compatible viewer or software. This allows you to review the model and ensure that the export process was successful.

5. Use in Other Software: Your simple OBJ file can now be used in various 3D modeling and design software for further editing, rendering, or integration into larger projects.

By following these steps, you can create simple OBJ files for your 3D modeling and design projects. As you gain more experience, you can explore advanced techniques and features of the OBJ file format to enhance your designs and workflows.