If its luck based, like dice, slot, or crash game there is no strategy you can employ the house always have the edge over you and this is something that is hard to overcome, but if its sports betting, you can rely on your analysis and expertise on how you know the game very well, but there's a chance that it will still not go your way.
You don't have to lose a fortune to finally come to the idea that gambling is for entertainment because it really is, just read about other people's experiences and you'll know that no strategies that can be employed to win in gambling continuously, have fun if you win then good just don't attribute it to skill or strategy.