There are a few ways to post to Instagram from Hootsuite. The first way is to use the Hootsuite app on your phone. Once you have installed the app, open it and sign in. Then, click on the three lines in the top left corner of the main screen and select “Post.” Type your caption into the text field and hit “Post.” If you want to share a picture with your followers, you can do that by clicking on the “Share” button at the bottom of the post.