Iam a thirteen yearold that deeply desires to be a pilot. Is there anything online that can help prepare me for flight school?

Flight simulator and a joystick for your PC

My dad taught aviation for 45 years. Yes, there are some things available online. But, it looks like you have to pay to use the majority of them or for what they will sell to you.

There is one site that I found that is free to use and looks really promising. However, I wasn't able to get into the section for the tutor. Maybe you will be able to do that. Here is the link. Pilot Tutor Aviation Training

Please see also, the following links.

Student Pilot - Flight Training Online

flighttraining.aopa.org - Learn to Fly - Be a Pilot, Student Pilot Training, Flying Lessons, Flight Training & Aviation Resources

What Pilots Need to Know - Google Search

Online Aviation Tutor - Google Search

Free Online Pilot Instruction - Google Search

Free Flight School Preparation - Google Search