my sorority doesn't have a junior alumnae group

But I wish we did. Since I graduated last June I still feel like a collegian. But I want to feel like an alumna. In San Diego we do have two different alumnae groups though. All the older alumnaes tend to join the more established chapter and the younger alumnae join the newer chapter.
I keep intending to join one of the chapters. But I keep thinking of these women as advisors and not as equals. So I'm a little intimidated.

Does anyone have any suggestions as how to get over that feeling?