It seems that you are trying to load images to your HTML pages using the tools from your hosting provider, correct?
In general, these are the steps to load images:
The first thing you need to do is to upload the image itself to your hosting provider. Once you have that image loaded, test to see if it loaded successfully by going to the URL that has the image. You should see the image only when you go to that URL.
Now, if you want your image to appear embedded in your HTML page, you need to make sure that the URL for the image is coded in your HTML. You can either provide an absolute (complete) URL or a partial reference (relative) URL.
To make it easier for you, I'd suggest starting with an absolute URL. So if your image URL is located at (http://domain.com/images/picture.jpg) as an example, you would need to make sure that this URL is in your HTML code.
For a relative or partial reference, you could code your HTML to just (images/picture.jpg) as the source file image.
For both cases, do not include these ( ) in your URLs.
In both of the above examples, you have created an 'images' folder to upload all your images. This is just a best practice and is not necessary, but a nice way of categorizing your online content. So if you don't want to create an images folder, you could load your image to (http://domain.com/picture.jpg) and code that for the absolute URL. For the relative URL, you would code in your HTML (picture.jpg).