Changed this feature request to just be for rotating items. If you also need support for grouping, please vote here: http://feedback.squidnotes.com/forums/177239-general/suggestions/33430924-group-objects
You can add a shortcut to your Home Screen to open a specific notebook (see http://feedback.squidnotes.com/knowledgebase/articles/1179331) or to create a new note in a specific notebook (see http://feedback.squidnotes.com/knowledgebase/articles/1179328).
It does not appear to be possible to create a widget that allows for taking handwritten notes directly on the Home Screen (due to the fact that you need to be able to swipe left/right to get to different pages on your Home Screen). Please vote here if you’re interested in a widget that shows a particular note on your Home Screen (and allows you to open it quickly to edit it).
An error occurred while saving the commentD Sidlo commented
Widget should display the last complete note, and scroll through prior notes.