How can I use my debit card without knowing my pin number, or any of my accounts information?

I have had this debit card for a while now and I want to start using it. I never used it before because I hate using cards to pay for things, and I like to save money. Can I just go to my bank and ask them to change my pin number? I have had this card for such a long time and not used it that I don’t even know how much money is in my account.