Hi,
Here’s the [https://downloads.dell.com/manuals/all-products/esuprt_laptop/esuprt_vostro_notebook/vostro-5560_owner%27s%20manual_en-us.pdf|owner manual] for the laptop.
Go to p.19 to view the necessary pre-requisite steps and then the procedure to remove the display assembly and then on to p.24 to view the procedure to remove the display panel.
Replacement screens are available online. Just search for ''Dell Vostro 5560 LCD panel'' to get results for suppliers.