Isn't AOC 30, now? she'd still be too young to serve as president in 2028/29, not until the following election in 2032.
I'm pulling for Corey Booker to make a strong run next time around. Possibly Kamala. Don't forget Gavin is likely to run soon, too.
Mind, I'd also be willing to consider a non-dem, as long as they aren't right-wing-nut crazy and do away with the social conservative religious BS.