Can understand how nervous you feel if you have not used Odin before.
The 'drivers' are what your computer needs to recognise your phone.
Install Kies on your computer and then connect your phone via USB to install drivers.
You can also install them from a link I will find for you.
Once you have the drivers, following my previous message.
It is a good idea to watch the video on cnet first.
Kies drivers here: