These aren't bad attempts by any means @Matef0316, but I'm afraid they're not quite according to our guidelines. They're all cropped too far from the face since we aim to have no more than 2-3 pixels of empty space above the head and the same distance beneath the chin. Also, in cases like this where the person has a perfectly good cut, replacing it with a lower quality cut makes little sense and is not considered an improvement anyway. Images like this should also be rotated to be upright rather than tilted to one side.

You seem to be using remove.bg, which is good, but when an image has a collar lower down than the above distance, you are to use this technique to nudge the collar slightly upwards: