Can I pin my own content to the widget?

Yes. Add it in the app first, then pin it the same way as anything else.

1. Add your own content

2. Go to the content you just added

3. Tap the share icon

4. Tap Pin to widget

It stays on your home screen widgets for 24 hours, the same as any other pinned content.

You cannot type text straight into the widget. It has to be added in the app first.