Experience is a big thing. Everything requires experience. To gain experience again, you have to make some losses first. You can't learn anything right if you don't make mistakes. So you should gamble as little money as possible in the beginning so that even if you lose in gambling, you can gain experience in gambling with less losses. But if greed works in you and you start gambling with big amounts by relying on luck in the beginning then it will surely hurt you a lot. So you should always learn money management. Then you will be able to lead a comfortable life.
Exactly experience is needed in all the areas of human endeavor but some comments here baffled me by saying experience is not needed in gambling. The person would just loss all to the casino. And even though the gambler is an underage and he has good experience to play gamble then he can play well and won't lose like the inexperience gamblers. And if the person is an adult and he doesn't have an experience he will not do well and lose more. In gambling you have to know what you are doing. So that even though you lose, it is not because you are not experienced but you don't have luck.