Complex sentence: The newspaper aims at young, well-educated (HBO or higher) readers in the 25-34 age group, most of whom currently do not read a newspaper, or only the free tabloids Metro and Spits.
Split into simpler sentences: The newspaper aims at young, well-educated (HBO or higher) readers from 25 to 34 years old. Most of whom currently don't read a newspaper, or only read the free tabloids Metro and Spits.