Need help with changing width on Wordpress

I've just started using wordpress and I need help with someone telling me how to:
-increase the width of my post
-move the text closer to the ''edge'' of a post.

What I mean by moving the text closer to the edge is this -This is what the text in the post looks like:
[space]textexttext[space]
*BUT* I want it to look like this:
textexttext
You see? I want the text to start on the edge of the post, and not after the ''spacing'' (because I want there to be as much space asap on my blog entry)

Can someone please help with this ? The wordpress theme is Cordobo Green Park 2 0.9.502, tell me if you can help. Please, I've tried for a week And if you can do it, but only willing in exchange for $ then pm me. I really need to get it fixed!

 

Do you mean the distance between the white container and the edge of the screen, or the text and the inside of the white container? It's easy to change either way.

 

Hey, thanks so much for the reply! The inside of the white container.

 

Open css file style.css and edit code

#content {
  border-right: 3px solid #D5DADD;
  margin: 0 350px 0 0;
  overflow: hidden;
  padding: 19px 0 0;
}

Code (markup):

to this

#content {
  border-right: 3px solid #D5DADD;
  margin: 0 350px 0 0;
  overflow: hidden;
  padding: 2px 0 0;
}

Code (markup):

 

Sweet101, you really think that that 19px padding is too much? The width of the white container is set to 958px. No matter how wide your screen resolution is, it will always be 958px.

#header,
#main,
#footer {
  background-color: #fff;
  text-align: left;
  margin: 0 auto 3px;
  width: 985px;
}

Code (markup):

If that's all you want to change though, RenoM88's solution looks like the right thing you need to change.