My two thoughts for your friend are to
1) identify some people in the field whose work intrigues him/her/them
2) contact these people in the field explaining his/her/their interest, inquiring for possible adult internships, advice on courses, etc.

Some neuroscience has strong pop culture outreach, for example...
1) Neuroscience For Kids (NFK), Eric Chudler
2) Brain Rules for Baby, John Medina