Experience is the best teacher. Some casinos has free trial for their games so that players can try and learn the mechanics of a certain game. Video tutorials are good references, but trying the game by yourself will give you more experience and knowledge about a certain game.
Yep, no matter how many tutorials you watched on how to play a casino game and how to place bet on them it won't take the place of the real thing and when you are doing it yourself, as long as there are free tests and demos for new players there won't be any need to make it look complicated while it's actually not, it's something like other usual games that you play on your phone maybe with some minor differences, most people that want to gamble will try out that game a few times before gambling real money anyway and that really should be more than enough for them learn and know whether they're good at it and want to gamble on it or not.
Wont be bad if you do take up some read ups or tutorials because you do at least know on what you are doing and the rest will be focused more on making strategy.
There are type of games which doesnt need for you to read on about the mechanics yet even just using up your own common sense would really be enough.
but there are games which are needed to be practiced on since games can be classified in both types neither pure luck ones or into those card games or sports
game which does need some sufficient knowledge for you to have some advantage when you do make out some bets or play with it.