You can make a shortcut on your desktop for Outlook sticky notes. Keep in mind that once you log off of your computer the note will go away or if you close the note and re-open it then it will be blank.
Here is how you do it.
Right-click the desktop, click on New, and click Shortcut.
In the Type the location of the item box, type the following path: "C:\Program Files (x86)\Microsoft Office\Office16\OUTLOOK.EXE" /c ipm.stickynote.
The path will vary depending on your version of Outlook. For example Office 16 is for Outlook 2016 so you might want to just browse to your OUTLOOK.exe file and add /c ipm.stickynote at the end.
Then lick next, name the shortcut, and then click Finish.