Is that possible? If so, appreciate if you can explain how it is done.
Technically, a long exposure can be done by switching to manual mode and selecting the exposure time (up to 30 sec in your camera). But in order to get a good exposure you also need to set the aperture and ISO. Getting a good long exposure result might be impossible due to the amount of light in the scene and the physical limitations of the camera.
To achieve the longest exposure you want to:
After setting these parameters, you can set the exposure time. As I already said, if you shot in the middle of the day, the exposure time will probably be too short to define as "long exposure". The solution to this is using a ND filter. ND stands for Neutral Density - it reduces the amount of light coming through, thus, enabling a longer exposure.
I suggest trying some long exposures at night or in low light scenes.