I want to study math , physics and astrophysics ,a little help ?

You need a PhD in those fields to do research in them. You can't teach it to yourself or learn it on your own. The books you'd study from in colleges, even at the graduate level, are still teaching you things that were learned a hundred years ago. You need the most up to date publications, the resources to do original work, and someone to guide you in how that works. Wait until you get to college.