Force SSL for entire website

I want every page of my website to force https. Currently, my website only goes to https when a link is clicked within the website, but not initially (from an external link or direct address typing).

I’ve tried adding the code listed in the FAQ’s:

function custom_force_ssl( $force_ssl, $post_id = 0, $url = '' ) {
    if ( $post_id == 5 ) {
        $force_ssl = true;
    }
    return $force_ssl;
}

add_filter('force_ssl' , 'custom_force_ssl', 10, 3);

But it didn’t seem to change anything.

I’ve tried putting a “/” in the URL filters as suggested and it forces HTTPS, however, it adds “~myname” to the url when typed, breaking the link.

For example, when you type http://www.example.com/webpage, it redirects to https://www.example.com/~myname/webpage. Yet all links within the site still work properly.

I know I’m missing something simple, I just can’t figure it out. Please help!

https://wordpress.org/plugins/wordpress-https/