I guess gambits? (just google for gambits)
But it's still a lot of work to learn all the lines and get experience with the usual positions and odd moves beginners will play against you. You can get a winning position with any opening you know really well.
But if you're saying you want to win in 20-30 moves a lot of times vs inexperienced players, then go with gambits. Elephant gambit, latvian gambit, Budapest gambit, englund gambit, king's gambit, danish gambit come to mind... I'm not recommending all of them, pick the ones that look interesting to you.
I was wondering if people could recommend some openings to preform when I'am playing beginners and not the most skilled opponents. I want openings that give me a significant advantage and work for anybody under 1500.
Thanks