I think there's no way how we can help beginners not to get addicted because that was a self-decision. The moment they enter the gambling, they should experience everything from winning to losing and the effect on it on their mental aspects. These are the factors that will help them decide if they will continue gambling or not.

If they will engage in gambling, only them will able to help themselves and not get being addicted on the way.

If we talk about not getting 100% addicted then discourage them from starting gambling at all.