I would like to upload images and send the link to my pupils so that they can draw them as they want. How can I get a shareable link, please?
If you save the image with IMGUR, it'll give you an imgur URL which can be shared.
For example: https://i.imgur.com/
If you want to import that image into Lunapic, you could build the import link as follows:
(replace the IMGUR link with yours)