To raise or not to raise

Im new to PLO hi and have begun playing small stakes rooms online. I have a history as an aggressive HE player but since playing Omaha have felt that aggressive preflop raising is somewhat misguided at these really low limits. But I see it a lot and am wondering if I should incorporate it into my game. I tend to be passive preflop and aggressive if I've hit post flop. I realize that most people on this site are much higher limit players but Id appreciate the advice and am looking to improve.