What are the benefits of Dhamma in this very life that could be understood by a beginner? Please limit the benefits to the here and now, because an ingenious youth hearing the benefit of future rebirths and also hearing hard to grasp concepts of karma might surely say “what’s in it for me now? what do I care what happens in the future?”.  In other words, one who is a beginner and who lack virtues will say “Ooh this karmic concept you teach is like borrowing money from someone I don't know and I don't have to pay right now so why should I care?”
By saying the above I’m not trying to open a discussion about Karma / Self etc… a virtue done because of idea of self as proposed by other religions where you get tormented in the future for action done here is a phony virtue, its like being temperate toward your wife for fear of losing her.
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.