I you have suceeded to upload the files using WinSCP, you do not need to learn anything more about it.
You should better ask someone acknowledged with your hosting provider if you have uploaded the files to right directory, etc. Or maybe to learn something about WWW/HTML, just in case you do not know how to link the images or how to enter correct URL in the browser to display them.
If you do not know whom to ask, you may post here what exactly you have done and what you have expected the result to be like. Maybe someone can advice you then, what you have done wrong.