For builing an online Store, I would suggest you to use Magento,OpenCart or Wordpress(woocommercer,wp commerce).
If I could work with you I would complete this job in time.
Your shop would have a responsive design in all devices and browsers. Uniqe & High quality Design.
I would like to know what would be sold in the store so I could have the opportunity to choose the best design.
I will design the logo + you will get all documentation how to easily manage your store.
Please contact me via chat for more information.