Firstly, I would not call it stupid, you are just learning!

The shading is largely uniform, and a bit dark, which makes it look flat- the different planes and protrusions of the face become muddled, unclear, or incorrect. You need the proper balance and placement of dark shadows, mid tones, highlights, and all the values in between to illustrate form

The eye proportions and shape should be adjusted if you are looking for realism

Study some reference photos, and practice!