Show entire post not excerpt or "show more"

You can use the get_post instead of using the except but If this confuses you you can simply put the excerpt length to 999 as below

function custom_excerpt_length( $length ) {
	return 999;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );

Put the above code in your functions.php present inside your theme.

Else if you are trying to have a post in custom place with custom length than this may be helpful

The length is set to 999.

I will try the other link you listed.

Goodness, I think that is over my head. I should have gone with a wordpress.com site this .org is kicking my tail. So much to figure out.