Can I get a code with a real example for inserting image ?

Answer 1

Here you go:
https://code.sololearn.com/W1dFe1U75Z9v/?ref=app

Answer 2

For sololearn programs you can't put images stored on your device so you might have to use a CDN (content delivery network) to link images in the page or use data uri images by converting your images into text that HTML can display as a image..
You can convert your images here
https://websemantics.uk/tools/image-to-data-uri-converter/

https://code.sololearn.com/WC54BZf4fJ94/?ref=app