@SimaoEsteves, I'm afraid this source should be leading to a much better cut-out so I'm re-opening this request.

As you're still working on your technique, can you please stop uploading your work as a completed cut? I'm only going to re-open it again, anyway

Instead, you should post it in the comments and ask for feedback. In this case there is too large a gap beneath the chin (it should only be 2-3 pixels) and the image should have been rotated 3-4 degrees anticlockwise before being cropped. Plus there are hardly any hair details at all.