1) Singer-Songwriter (did a year of training at the California College of Music for this and despite an EP and single on iTunes and tons of unpaid performances here and there, I'm still struggling but I'll keep going forward with music while I look for day jobs that I still like
2) Advertising Exec/Art Director (this is kinda what I'm trying to get a Masters in - I need to gain new skills in this and to network)
3) TV Screenwriter/Producer (had a screenwriting background and would like to be one of those powerful women who revolutionize the TV industry)
4) Best-selling fiction novel writer
Don't worry. You'll fit in. A gap of several years is usually not a problem. You're able to gain new insights from your peers and vice versa. I once enrolled in an advanced diploma program where I was the youngest and most were over 10-20 years older. Hope you'll have a wonderful time still.