I'm new to credit cards. What is a "statement balance" versus a "current balance"? Same or different?

I recently applied for my first credit card and got approved, and have an online account. However, I am a bit confused. My current balance stands at about $50, but my statement balance is at $0. My guess is that the statement balance is the amount I am actually billed, whereas the current balance is simply how much... show more I recently applied for my first credit card and got approved, and have an online account. However, I am a bit confused. My current balance stands at about $50, but my statement balance is at $0. My guess is that the statement balance is the amount I am actually billed, whereas the current balance is simply how much I've used during the current billing cycle? What further confuses me is that the due date is today, but when I try to pay, I can't. I selected "pay balance in full," but it didn't work because it was at $0. Then I tried "pay minimum balance," and that didn't work either because that was also at $0. So, do I owe nothing as of now, and should I wait until a statement balance shows up? Help with this would be great. Thank you.
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