Wordpress codex is your best friend. This is extremely easy to do, just depends on the theme. Some have theme options, some will need you to go into the theme files and remove get_sidebar() but of course that could screw up the layout. However, most themes are set up in a way where if you remove that, it should fix layout automagically. You may need to do some CSS adjustments though, like making the left width container a little wider to make up for the lost space. Good luck bros!