It's not a wordpress wizard question... :-)
It's a CSS issue.
Did you read my post above ?
The content of your center column is in these three divs :
And your sentence : "Welcome to JohnThomasMusic.org" is embeded in a <p> tag...
Then look in your style sheet... (style.css)
content : padding: 10px;
post : padding: 10px 0 10px 0;
p : padding: 10px 0 0 0;
The first div (content) put a 10 px padding... the second div (post) add another 10 px padding inside the first one. Finally, the <p> tag add another 10 px padding...
So, starting from "content", you end with a total of 30 px... About the space you have at the top I would guess... Your solution : adjust these value to get what you want.
Two principle about padding and margin to get you started :
1- when you have only one value, ie : padding: 10px : it means that the padding will be 10px on each side of the div (top, right, bottom, left)
2- When you have four value, ie : padding: 10px 0 10px 0 : it means that you have a different value for each side, starting at the top in clockwise direction : top right bottom left.
For instance, in your "post" div, you have : padding: 10px 0 10px 0;
It means : 10px top, 0px right, 10px bottom, 0px left.
Another example, your <p> tag :
padding: 10px 0 0 0;
It means 10px top, 0px right, 0px bottom, 0px left...
Finally, a last example, in your "content" div :
It means 10px padding for each side...
I suggest you to learn a little bit about CSS :