How can i learn wordpress themes and plugin development.

Hello to every body.

I am a wordpress programmer working in this field last 7 years. peoples who want to seek about the wordpress must contact with me. I teach you how can you code themes with your hand.

we can :

1) Write Complex wordpress custom plugins
2) Implement wordpress eCommerce functionalities
3) Configure wordpress plugins/themes as per requirements

Interested person must contact with me on my skype:wbxperts8

Thanks.