I'm 26yrs old and will be attending a decent collage. I want to join a frat, I've gone to frat/sorority parties and had fun.

I know I won't let my age hinder my experience, I also look like 19-20yrs old, but what's your experience as an older man in a frat or older people in frats? I have very little frat knowledge.

Any tips or suggestions. Thanks in advance