I understand that for using the API that allows to provide autocomplete addresses and to show the nearby places in a maps, I need to have a billing account. It is just a universitary project, so I would not like to have a subscription. However, I read that when I enable billing on my account, I will not pay nothing. I'm not sure about these information. Anyone could give me more information?
Yes u should have a billing account. You just need to do just link your credit or debit card to your account unless your API will not work. Just add a your card u can get free 3 months trial