Q: Can expand my communication without adding new accounts?

A: You already have GMail account. Google+ is the right tool for you. You can create circles of friends, classmates, colleagues, students and share the materials with particular group without interfering. You can have up to 9 people in hangout sharing their displays and talking. Check it out:

http://www.google.com/+/demo/

http://www.google.com/+/learnmore/

See you in my circle!