It's true that when one lack knowledge about gambling and feels like he could just engage gambling like that, then he may ended having losses and that alone nay cause him to being depressed and unhappy because he never know and understand the risk in gambling yet, the way such is seing gambling is different from how it appears in reality, this is to encourage us that we need to embrace learning before going ahead in doing anything we so wish to have done in gambling.
Of course we will experience losses in gambling if we do not understand well about the gambling we are playing and also this will make us unable to enjoy the game and also we will suffer many losses in gambling, it is important for us to understand the risks of losses that will occur. We can make mistakes when gambling and it is also very important for us to be able to control our emotions when gambling.
We must understand well the gambling we play and we must also be able to enjoy every game we play because if we cannot enjoy the game, of course we will experience losses in the gambling we play.
Gambling requires knowledge, yes, but it can be grouped under some categories like limitations. A gambler who claims that he owns a pattern or knowledge that guarantees him a sure win is not right. Gambling has no accurate means of winning, regardless of our level of understanding of a game or gambling, generally. The importance of learning in gambling, is to figure out ways of avoiding much loss of money and be able to correct our mistakes. In the case of OP, he happened to be new in the game of black roulette it's acceptable that he needs some knowledge of the game, but it doesn't matter in winning or losing. He could win if he was lucky to play using a machine that was programmed to fetch him some wins after wagering few amount of money. I noticed that the machines determine how we win. In the physical casino, the machine we play with matters, and some pro gamblers have testified that it's crucial to play with one machine and master how it works. But the house also figures this out and reprograms the machine after maybe a week. Not to be on the losing side.
The house and the gamblers are in an endless competition of who is most observant. But, the only casinos may work uniquely, may be it'll be coded or programmed to pay out some amount of money once the player has spent a specific amount while playing the game. So, most gamblers don't understand how the machine works, and for that, they need to be observant of their money, not the machine, instead. At least, saving up money is also part of winning. No need to spend money on a machine one has no prior knowledge about. In a nutshell, the knowledge we need in gambling is broad and should be used accordingly, most especially to suit the house edge. The house needs money and works each day to earn through the gamblers, and the gamblers do their best to earn from the casino too. So, gamblers need to be careful and in control of each action they choose to take while gambling. As it's their responsibility.