Add a tab to the sidebar with 3 notes arranged vertically.
Ideally, each note would have a few of its own controls, which might include replacing the current note with 1-2 others like it. For example: Pane 1 = Inbox, Pane 2 = Today’s tasks, Pane 3= Urgent-Important tasks. Pane 3 might be switchable to Upcoming Tasks or Overdue.
Are you thinking along the lines of something like this? You can click and drag a note tab header (you’ll see your pointer become a glove) into the Sidebar. I tried up to five, but it gets a bit cramped.
but I haven’t really seen any tutorials specifically about this.
I’d open the Sandbox (Help / F1 -> Sandbox vault), open a bunch of tabs, and play around with the drop zones until you get a feeling of what you can place where.