You seem like a person who just wants to get a sense of the game. Nothing too serious or stressful. I know you have said that you do not mind losing, but still you should know that you do not have to bet any money yet since you are just looking to have fun. There are casinos that you can play their games in free mode- it doesn't require that you bet anything. I also think that you don't even need to register. Those are like lures to make want to register. One of the casinos that hd the feature the last time I checked is Megapari. It's the same fun but there is no win or loss of some real money involved.
Those casinos who has got the free mood most likely use that to lure the players to registering and I'm sure by the time you register and start playing with your real money you will find out it will not be as easy as it was in the free mood so it's almost same thing as gambling without the intention of winning but just to have fun.
I think the intention of having fun is just a strategy to not getting hurt if you turn out loosing your games, but then some persons do not mind probably because they did Gamble with their spare cash so they literally don't get hurt when they loose the money, they find it more fun because whenever their money is involved, they get more thrilled than in free mood where they know nothing is at risk and they aswell Don't have to stress about the accuracy of their picks, they can literally depends wholely on lucky because it's just for fun.
What I can tell newbies is to be very careful when choosing casinos, because there are many who are scammers, especially those who are slot machines because that is when they promise to win money the most, with free spins and they tell you that They win and then they have to deposit, but they turn out to be a scam, what I recommend is that they go and play on sites that are recognized, because they are sites that are not going to take your money or anything like that, so that's what you know. They must take care.
What I do is play in recognized sites, in Rollbit I have adapted a lot, in addition the games they offer are excellent, and I can also attest to Duelbits that they are good sites and that they have great promotions, many good things to enjoy, which What matters is to enjoy, and know how to play so that the money doesn't go too much, there is no need to separate the idea from making money.