The casino section is simpler than the betting board in one respect, because there is no opponent to analyse, and harder in another: every game rests on a house edge that stays the same however the session runs.
What is worth understanding before you play is volatility, not theme. High variance needs a deeper budget just to last until the features the game is known for arrive; a low-variance game pays little and often, without the big swings.
Two habits are worth more than all the detail. Set the price of a session before it starts and pick volatility that fits it. And treat a win as a good moment to stop rather than as evidence that the run continues.