Register hooks in own plugin

Hello,

because I don’t like it to download oversized plugins I started writing my own little plugins that i use in my projects.

I have a directory called “my-plugin” inside there is a file called “my-plugin.php” it looks the most time like this:

define("EP_PUSH_DIR", plugin_dir_path( __FILE__ ));
define("EP_PUSH_URL", plugin_dir_url(__FILE__));
		
// include required files
require_once(EP_PUSH_DIR . 'class.ep-push.php');
		
// init the classes
add_action( 'init', array( 'ep_push', 'init' ) );
		
// when admin then include admin class
if ( is_admin() ) {
    require_once(EP_PUSH_DIR . "class.ep-push-admin.php");
    add_action("admin_init", array("ep_push_admin", "init"));
}

but where I have to define the hooks that i use? in the class init function? Because just now i have a problem with the “wp_insert_post” hook it doesn’t fire… is that the correct way?

class my_plugin_class {
    public static function init() {
        add_action("wp_enqueue_scripts", array("my_plugin_class", "my_method"));
        add_action("wp_insert_post", array("my_plugin_class", "my_method"));
        add_action("wp_footer", array("my_plugin_class", "my_method"));
        add_action("wp_header", array("my_plugin_class", "my_method"));
    }
}

is that correct?