Now, there's a simple question that I want to ask: do you guys think I should introduce her to gambling? If yes, what's the easiest game she can stake in and also enjoy while gambling?
Well, with such an approach and desire for additional sources of income, I would discourage her as well. Gambling is gambling for a reason, and it can be tricky to make money, especially for newbies who need to learn a lot about how games work, controlling emotions, and bankroll management, some people learn about it for years. We talk about all that here, but to be a responsible gambler doesn't happen just like that.
But if she decided to get in and insist on learning more, to be honest, I wouldn't try with their easiest games, those are lucky-based games. Poker and sports books would be my choices, both are harder to learn, but her chances of making a profit would be higher in the long run.