Sounds like its doable. Apparently you can embed Hackpad on your site using their code:
<script src=“https://hackpad.com/<string>.js”></script><noscript><div>View <a href=“https://hackpad.com/<string>.js”>To-Do</a></div></noscript>
So all you'd have to do is create a static page maybe and paste the above in a template
@v4 I think there´s already a plugin that lets you do that, show the N last posts from a category in the home page. Since you only have one category, i think that meets your requirement. Check the plugins category in this forum, i think you'll find it there.