First of all, gambling shouldn’t be considered as a way to "get rich". I mean I'm not saying nobody had such luck that made him way richer than he used to be, so it's possible but in the long run you are set to lose in gambling.
Also stats show that 99% of sports bettors aren’t winning in the long run. So it’s very unlikely that you and I can do it in the long term. Maybe in the short term we can bag a few bucks betting on sports. But the best thing you should be considering is not to think of sports betting or casino activities as a way to get rich.