After looking at the specs for this laptop, it would seem that the only external display option is via an HDMI connection. Meaning you need an HDMI cable, and an monitor with an HDMI input. Once you have the required thing(s), simply plug it into the external display, and turn it on. Windows should automatically detect that another display has been connected, though it may not show a picture on it automatically. If it does not show anything on the new screen, then do this.
Go to desktop
Right click>Screen resolution>detect>(if it shows two screens) extend or duplicate these displays>click apply
Done.