Hi Alloy,
Luckily replacing the screen on the Nitro 5 is not too complicated!
Here is a link to a YouTube video that will show you how to do perform the replacement yourself: [link|https://www.youtube.com/watch?v=2RQMAYA2-eQ|Acer Nitro 5 Screen replacement - YouTube|new_window=true]
and here is a link to a replacement screen (You can also find them on eBay): [link|https://www.laptopscreen.com/English/model/acer/NITRO~5~AN515-54~SERIES/|Screen for acer NITRO 5 AN515-54 SERIES. Replacement Laptop LCD Screen (laptopscreen.com)|new_window=true]
If you're comfortable going a step further, I would disconnect the Main battery which can be done by undoing the screws holding the bottom plate. This Will just lower the chances of the screen getting damaged during installation.
I hope this helps, let me know if you have any other questions :)