Many thanks!!

I am graphic designer mostly web/print and I have been asked to create graphics for an online virtual conference center. They want graphic representations of things like meeting rooms and ballrooms to be displayed on the webpage. I have no 3D modeling experience and downloaded Sketchup to try and get something put together.

Is this something I can do in Sketchup? I made a room and added a table but I have no idea ho to add lighting or windows or anything. Is this going to be something i can learn within a few weeks time?