ADIVE NEEDED

Hello fellow travelers, to start, my absolute dream is to graduate high school and take a gap year for backpacking. I want to literally graduate and leave within the next couple of days. To give some backstory, my home life isn't the best. Ive always yearned for more. Backpacking is my dream. I am a female sophomore in high school and will be able to drive soon. Obviously I will need to get a job so that I can start saving some money. Please answer some of the questions below as it will help me so much.

How much money should I save?

Where is a good place to go backpacking? (Europe, Asia, Alaska, etc.)

How can I literally just pick up and leave?

Any other advice would be greatly appreciated.