Discovery flight at 16, Private Pilot at 17

For my 16th birthday, my father thought it would be a great idea to gift me a discovery flight at the local flight center. From the moment the wheels left the ground in that Cessna 172 Skyhawk, I knew that one day I wanted to be able to do this. However, I was left with the heavy burden of reality; where do I even start to obtain this dream and more importantly, how will I be able to finance this?