Redirect User Profile Page URL

yz-redirect-profile-page.php

<?php
/**
 * Redirect User Profile Page URL
 */
function yzc_redirect_user_profile_url() {
    if ( current_user_can( 'administrator' ) ) {
        return false;
    }
    global $pagenow;

    if ( $pagenow == 'profile.php' ) {
        // Get User ID.
        $user_id = bp_loggedin_user_id();
        // Get Current User Domain.
        $user_domain = bp_core_get_user_domain( $user_id );
        // Get Profile Url.
        $profile_url = $user_domain . bp_get_profile_slug() . '/';
        // Redirect to profile.
        wp_redirect( $profile_url );
        exit;
    }

}

add_action( 'admin_init' , 'yzc_redirect_user_profile_url' );
 

I'm a noob, how do I integrate this to my site? I downloaded a plugin to turn the code into a shortcode, inserted it into a page, but no luck.
I also uploaded this code in a file called "profile.php" to my current themes dir, not sure how to call it though. Do I need to change anything in the code to get it to work?