C++ Upload a Image to API

Hello,
I am a new developer and I am stuck on one point.

I am creating an application and I would like to know how to create a blueprint for when I give a file path it sends an image to an API with a Header “Content-Type multipart/form-data”

Currently I try to base myself on this course but it is complicated ^^’

Thanks for your help and I’m ready to pay a small amount if someone do the whole C++ code.
My email to contact me if needed : ryan.milano@epitech.eu