At the prompts asking you to tag people or add your location are a selection of five social media platforms outside of Instagram's control that you can post to. These are Facebook, Tumblr, Flickr, Swarm and the inevitable Twitter. Simply activate the platforms you wish to share with and your message will be forwarded to those accounts. Be wary, however, as the one fault on this sharing is that those social media platforms will not post exactly the same way. Though Twitter will post your message, it will do so as a link back to Instagram in order to see your image, meaning your audience will need to actively engage in order to see your full message.
Keep your message concise, engaging and accessible and you’ll get the hang of Instagram in no time.