It sounds like you have broken the LCD screen. This is an easy repair, so don’t sweat!
Feel the top width of the laptop screen, you should feel a slight ridge. This is where the front screen bezel snaps in. Using a guitar pick you can gently pry the bezel off. From there, there are four screws in the four corners of the LCD screen. Unscrew those, gently pull back the screen to rest on the keyboard. You will see a cable ribbon, gently disconnect this from the LCD screen. Order a new screen per your device specs, connect the cable ribbon to the new screen, screw the 4 corner screws back in, snap the bezel on, and you are good to go. There are plenty of detailed guides on iFixit, for a screen replacement it does not need to be an exact match to your model for you to get the gist of it. Good luck!!