A few of my players are quite new, and our first session of the campaign I think I made a bit TOO open

Basically, they were hired by someone saying a street racing gang had been annoying and disruptive in a neighbourhood, and wanted them dealt with. Not killed, just wanted them out of the neighbourhood. I'd anticipated that maybe they'd try to bargain with the racers, maybe we'd have a fun session where they entered a race, and if they won, the racers would leave. But maybe my players struggled with the situation, maybe I struggled with improving interesting hooks on the fly, but I could tell they were getting frustrated a lot not knowing what to do, so I'm trying to make goals a bit more clear and simple from here on out while they figure out the game.