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Through most of my life, I believed that I was utterly incapable of doing math and mostly just kind got by in high school, didn't really think I would need it that much. Then I took a reality check the first time I attempted the equivalent of my country's SAT test. At the time, I got in my head that I wanted to be a computer engineer and that required at least above average grades in math and physics so that I could have a chance.
There really isn't much I can offer in advice, besides: diligent study. That was what got me by. Sitting my ass at the desk everyday for hours on end, starting from first principles (and I mean first principles, like basic arithmetic first principles) and doing as many practice problems as I could. I probably did too many of them, but getting them right was the only thing that brought me any confidence that I was learning. I did that for about a year and, while it didn't turn me from math illiterate to math genius, it gave me enough of a foundation to get into college and have a easier time than my peers on subjects like calculus.
In your case, you can take a lighter approach, since it isn't urgent by any means, and you probably won't have as much time as I did. I recommend setting a time whenever you can to study, ideally it would be around two hours, but I find it more important be consistent about it. If you are anything like I was, you may have some knowledge on math, but its akin to Swiss cheese: full of holes. That being the case, start from the earliest point it makes sense to you. I was very paranoid at the time, so I started from basic arithmetic and, although that may not have been necessary, starting from scratch gave me the confidence that I wasn't missing anything going forward. Mathematics is a cohesive structure, where the higher elements are build upon the lower foundations, you cannot get very far without having a good grasp on the basics. As to learning resources, there are many online for free (Khan Academy[1], Paul's Math Notes[2], many introductory books at the Open Textbook Library[3]) Lastly, try to have fun with it. Back when I started the journey, I was to focused on what I could get from learning math (that is, getting into college and then, hopefully, a job), that took out of the experience a bit and the only thing that kept me going, though I didn't recognize at the time, was the joy of learning something that I believed my whole life to be unapproachable, at least by me. So be patient, if you bang your head enough times against this wall, I can attest that it eventually starts to show cracks. Good luck on your learning journey. -- [1] https://www.khanacademy.org/
[2] https://tutorial.math.lamar.edu/
[3] https://open.umn.edu/opentextbooks/subjects |