Add a new instagram widget

Follow the instructions here.

Select Featured Posts ("You Might Enjoy" Section) - Home

To display featured posts, do this:
1. Go to Layout -> open the "You Might Enjoy" widget from the "After Second Post" section (it's below the Blog Posts widget).
2. Change the word Featured that's selected in the screenshot below with the label you want to display posts from:

3. Click on "Save".

Here's the code for the featured posts, in case it's deleted:
<script type="text/javascript">
var numposts = 3;
var displaymore = false;
var showpostdate = false;
var showpostsummary = false;
var numchars = 1;
<script type="text/javascript" src="/feeds/posts/default/-/Featured?published&alt=json-in-script&callback=featuredposts"></script>