Hi,
I am new to Magento, I installed magento 2.0 using Digital Ocean image. Everything seems to be working fine except extension. Any help will be very helpful.
I can't install an extension neither. It seems that the documentation is not in sync with what you need to do in MAgento 2 for installing an extension...
For example, to add a new language as this page describes, it says:
| Return to your store Admin. On the Admin sidebar, tap System. Then under Extensions, chooseIntegrations. | 
| 5. | When prompted, log in to Magento Connect Manager. Then, do the following: | 
| a. | In the Install New Extensions section, paste your extension key. | 
| b. | Tap Install. The language pack you have chosen appears below. | 
| c. | When ready to begin, tap Proceed. | 
| 6. | To return to your store, click the Return to Admin link at the top of the page. | 
None of these instructions match with anything in the store Admin ... ?
Has anyone installed a Magento 2 extension!!???
For now (while Magento 2 Marketplace is not ready yet) you should install Magento 2 extensions through the Composer.
How to install a Magento 2 extension from a Git repository: https://mage2.pro/t/25