Hey Valeria, I’m just a lame American who can only speak english, so I apologize if this answer doesn’t make sense. I threw you’re message into google translate, hopefully it translated correctly. If you are trying to use the minecart in the mines you should know that it isn’t functional until you get to at least floor 10 of the mines on foot. Once you do that you should be able to use it. If you’ve already gotten to floor 10 or beyond and you still can’t use it let me know, because that would be a bug.
As for your game, it sounds very cool. I’m obviously a fan of the farm sims like Harvest Moon and Stardew Valley. If you want to make a similar game with your own twist then I wish you luck. Learning to code can be tough, but if you stick with it I’m sure you’ll get there. Once you get past the basics things usually start to click. It’s just a matter of persistence really.