When you first start playing Stardew Valley, you might not have access to the Mines right away, but don't worry, it's easy to unlock. You just need to upgrade your axe and clear the debris from the entrance to the Mines. It's like clearing out your garage or attic - it might take some effort, but it's worth it in the end.
Once you're inside the Mines, you can start mining rocks and ore deposits to find copper ore. It's like digging for treasure, and you never know what you might find. You can also find other valuable resources, like gold and iron, which can help you upgrade your tools and equipment.