My situation is that I'm 17, and graduated high school early due to the CHSPE test. The only math I have any real knowledge of is algebra 1, since I forgot geometry and barely got into algebra 2 before I graduated. No books have worked, Gelfand's Algebra frustrated me exceptionally because it was too complicated, Practical Algebra:A Self Teaching Guide was too complicated, No Bull**** Guide To Math And Physics was too complicated, Khan Academy is too broad and keeps bombarding me with stuff from below algebra 1 for some reason. I desperately want to be an astronautical engineer. Are there any other options for self study, will I have to waste some semesters with college classes for basic math? I've gotten an excellent knowledge, memorization and problem solving ability of every other science I've tried to learn, math is the only exception and it's holding me back from more intimately learning everything else.