Or you can just play demos. That's what they're made for in the first place, to try the game and see if you like it. But if you already enjoy it and don't want to gamble with real money, why not just keep playing? I don't know how practical that is, but there's a demo here too: https://minescalc.com. It's actually a good site that shows how Mines works. The idea is that you practice, read about the game, learn the rules, and then move on to a real casino that has it. But if you want, you can just stay there instead.