Trying to show the contents of a specific post

Ok, so I’m trying to learn more about plugins and the functions.php file. What I’m trying to accomplish is to query the WP database and find the post_name of About and display it. This is what I have in my functions.php file:

function about_page_excerpt() {

	global $wpdb, $tableposts;

	$aboutme = $wpdb->get_col("SELECT post_content FROM $wpdb->posts WHERE post_name = 'about'");

	echo $aboutme;

}

Now when I try to use <?php about_page_excerpt(); ?> I get Array as the display. What am I doing wrong? Thanks!