Redirect to {custom} login web page if not logged in and redirect to house if logged in consumer attempt to login, how?

I am growing a plugin and I have to redirect to not logged in customers to a {custom} login web page on frontend so I wrote:

add_action( 'template_redirect', 'redirect_if_not_logged_in' );
operate redirect_if_not_logged_in() {
        if ( ! is_page('slug') && ! is_user_logged_in() ) {
            wp_redirect( 'custom-login-page' ) );
            die();
        }
    }

It really works however now I have to redirect logged in customers to house web page in the event that they attempt to entry immediately (typing URL) to {custom} login web page. If I add an else in redirect_if_not_logged_in I get an infinite loop…