Go to "Profile" after clicking on your username at the top.

Create your First Backlink by clicking on 'Add Links' as given in the pic below

Now, click on "Write it now" as given in the pic below

Create your Second Backlink using the format given below

Now click on "Blog Posts" and add an entry to create your Third Backlink (You can add a blog post after 3 days of joining the website).

Voila! Your backlinks are ready.