Opened iPhone SE wrong - screen with lines and no video
Unfortunately you have damaged the LCD screen which wont allow you to see any visual output until replaced with a new/working screen.

I'm not sure about your location but iPhone repair shops/stalls are common place all over UK (hopefully USA too). 

If you feel confident simply a replacement via  ebay or amazon following a step by step video guide like ' Jerry RIG ' on Youtube who has excellent tutorials. 

Alternatively you can opt for a local vendor to fit a new screen, inadvertently checking everything else is ok and not damaged without you having to pay for a potentially unusable LCD screen!