Hello,
Just locate a Joomla plugin similar to yours, in the docs you can find links with examples to the code. You can copy the plugin directory structure, rename it and change its xml configuration parameters. Then go to your backend, extensions, discover and install it. Now you have your own plugin and you can do as many changes you want.

Hope it helps.

Hi Juan,

I get this, the bigger problem I have is how do I make it an on_after_save event on one of my components I created here... how will my plugin know about the component etc ?

Hope it helps: docs.joomla.org/Triggering_content_plugins_in_your_extension