What are the benefits of Dhamma in this very life that could be understood by a beginner?
Karma works in this life too. If you are kind to people, you create friends, then friends will take care of you. This is called karma - creating conditions for your future, in this life.
When you are driven by emotions, like obsession or negativity - you become kind of blind, so you create bad conditions for yourself. So seeing your mind and developing ability to stop harmful thoughts is useful for you, in this life.
Stupid people always argue about things, they always see them from one side only. Buddhism teaches you that things have many sides, and when you see it from all sides - you don't argue. This is useful for you, in this life.