With an ArcGIS Home (Personal) Use Account, you get the following
The no. of AGOL named account you get with an ArcGIS personal use license is one (01).
To share with others, you might like to share the content with everyone (public), and share the URL of the Map/Web Application with your fellow mates.
Share maps—ArcGIS Online Help | ArcGIS
Share items—ArcGIS Online Help | ArcGIS
Think Location