AGE is not really an issue. It’s your junior class level that comes into play. Sororities love to have PNMs join as freshman and enjoy 4 years in the chapter. There are less spots for older girls and transfer students. But juniors do frequently join and there is hope. You will be in a class with a majority of freshman, but there should be a few other upperclassmen as well. Most new member classes are a mix of class levels and ages.
Please be assured that you are not too old to go greek! Your dad and brother are thinking of the pledge/initiation program they went through as men, which is nothing like the experiences of sorority new members. Not even close. You will not be hazed, forced to drink, made to stand around naked, or participate in other crazy fraternity pledge activities. Sororities treat their new sisters with lots of love and attention. You will be given crafts and cookies, NOT punishment or humiliation. All NPC chapters have strict anti-hazing policies. Bad treatment has never been a huge problem with women’s organizations anyway. You can put that worry to rest.
Your most difficult challenge is just getting into a sorority as a junior. Pick a university with lots of chapters, emphasize your added maturity and strong academic record, spotlight your leadership abilities and you should be seen as a wonderful addition a fall pledge class. Make sure you get along with the younger girls and fit in with their lifestyle. Don’t appear as an “old lady” in a sea of youngsters. As long as you are similar to the other PNMs, and you’re flexible, I think you will have bid day success! xoxo ;)