Well, there are a few ways. One is to use Instagram's built-in editing features. It offers filters, cropping, and brightness adjustments. Another option is to use third-party apps like VSCO or Snapseed that give you more advanced editing capabilities.
To adjust a photo for Instagram story, you could first take the photo in good lighting. Then, use apps like Adobe Lightroom or PicsArt. These apps let you do things like color correction, adding text or stickers, and adjusting the aspect ratio to fit Instagram's story format.
You can use various photo editing apps like Instagram's own filters and tools. Just open the app, select the photo, and start playing around with the options.