Here are a few options for preparing an object file for laser work:
Luban Shape Library
Use built-in designs in the Luban Shape Library: Laser Shape Libaray.
Design:
You can draw with a pen, design a 2D image with graphic design software such as Inkscape and Adobe Illustrator, or simply select a picture from your smartphone.
Take a Photo:
You can get a 2D image of scenes or objects in real life by taking a photo with your smartphone.
Download:
You can find various beautiful images online from websites like pinterest.com and vectorstock.com.
You can modify the picture to make it more suitable for laser engraving or cutting by following this guide: Prepare a clear picture for laser work.