When I was 8, I spent 6 months in hospital and that was over 50 years ago. Not much to do, so my parents made sure I had lots of puzzle books of all kinds as well as story books. One of those books had a chapter on gambing, which I found interesting, it was written for children. It made the claim that as long as the "bank" had a significant value greater than your own (by at least 10 times), you could not win against them even if the odds were 50:50. As the decades have gone by, I followed this up with other research and basically, gambling is a mugs games if you are not the bank.
Yes, you can at times win and come out ahead. But on the whole, you will lose. My father's advice has always been: "Son, treat it as entertaiment and spend only what you can afford to lose like every other form of entertainment. If you think you can win, you be the fool and will lose more than you can afford." I have also found that gambling institutions are so depressing a venue to be in.