Sandy,
I pledged when I was a transfer student, making me a junior, and 28. So I instantly became the oldest (in age) sister upon initiation!

I will be thirty next April. Do I mind? NOPE! I wouldn't change a thing.
I say, GO FOR IT!!! I think you will find that you will find that you won't regret the decision that you made.... Let us know what you decided.
__________________
ZTA
"Even in our sleep, pain which cannot forget, falls drop by drop upon our hearts. Until against our will comes the wisdom of God."