Start ASAP !
Do your college major in aviation related subjects, or best at a college that will get you a degree in aviation.
In todays real world it does not matter who pays for your education, as far as you get it done right and it gets you a great job at the end, hey! gift your dad a nice car once you have that airline job.
Research this web site as much as you can will get lot of good info.
stay focused and fit !