There are not many casino games that I play. But the most fun for me is slots. I don't know what kind of game Op likes, but if you want to try slots, I think many have given recommendations for the best casinos.
Choose one first, if you feel that something is not fun, you can move to another casino recommendation.
It's not a problem to try several casinos to get experience. Some offer deposit bonuses or free spins for new users. Some casinos even allow beginners to use demo games to try their initial experience.