Is there a way a 17 year old solo traveller can book hotels alone?

I’m 17, and will be 17 by the time I will start the trip. I heard that’s hotels will only accept those 18+ and sometimes even older. The problem is, I already bought the ticket. I will be alone with no parents or older siblings or even a friend who is above 18. Is there a way I can book hotels anywhere while being under 18? And is there anything else I need to consider being underaged?