Diggit Drupalextras

hie..everyone..well i am a newbie to the great world of drupal.However i have managed to develop a website that is fulfilling my requirements.
Well,i wanted to know how can i preview it,in the same way it will appear when published on net.?is there any way out?
Along with that i have got no clue of how to publish it on internet.i am having the domain name as well as booked the hosting for that on hostso.com .
Can u plz help me how should i go about it as in how should i take the back up of my website and host it.
Looking forward for your help...