Just another reminder:
First off, your blog is whatever your username was on WordPress. So my blog is docdunn.wordpress.com. So your blog will be yourusername.wordpress.com.
To get to the dashboard, where we control everything in WordPress, you will need to go to https://yourusername.wordpress.com/wp-admin. Remember to replace yourusername with the user name you used to create your blog. Bookmark this site.
Here is a video on WordPress widgets, such as Search, Twitter Timeline, Instagram, RSS, RSS Links, and Links, and how to add them to your blog.