I think, there is no difference first, second or third game, if you are lucky enough at that day, you win, that's all.
That's all and it comes usually to the beginners so we therefore conclude that beginners luck is true. I believe that it comes to the right person but not all the time its applicable to every beginner that is gambling. The only thing that I can say if a beginner is lucky that will push him to play more.
I think that beginners would visit casino with a gambling expert and see how he plays the game and try to catch the tricks and skills of gambling. I dont think that only luck will get them money. No doubt that luck is a main factor in gambling but not in all gambling. Beginners should avoid difficult games because these are not for them. They will just lose their time and money.
There are different games; some depend on luck like dice games or sports betting and some need experience, tricks, gambling tactics and skills. If you an experienced gambler you will win the game otherwise your luck will not favor you. If you bet on sports, you will depend totally on your luck. There is no beginning and ending in these types of gamblings.
There is no trick or whatsoever you want to call it that would supersede the idea that luck is actually the main thing when it comes to gambling and it does not have anything to do whether you are a beginner or not.
I understand plainly what you are trying to say, considering that you may want to make use of some strategies to at least be able to have a long game and have something probably to play by when it comes to the rules you have placed for yourself, but really, it all still balls down to luck at the end of the day which would determine you losing or winning.