It is really hard to safe gambling because you will spend a lot of money with it and that is bad because if you lose that it would be all wasted and that must not happen to you.
You can play with some small amounts if you dont want to lose that much money but the chance to win is also smaller.
Yes the most safe way of playing gambling is that you invest a smaller amount and if you see that you are losing then do not invest again as your luck is not going to favor you in the gambling but it will not mean that you are unlucky it will mean that your luck will work in any other place for you which will be more important than gambling.