Kinda don’t like this

Hello everyone I just got my first apartment so excited and nervous !! Today is the first night I am sleeping in my new space and I noticed this when I turned off all the lights to go to bed. My front door lets in a lot of light, honestly it looks like the door doesn’t even fit it kinda makes me super anxious idk Im quite young and I just moved out my moms house so I’m kinda overthinking everything. Should I be concerned about the door or don’t even worry about it ?