How can I do better?

So, currently, I have an SAT score of 510 in the CR/Writing and Language part and a 490 in math. I know I can improve in reading easily but not the math. For some reason, math is so hard for me to do. I have so many practice SAT books and when I try to do problems, I can never understand how to do it. For example, if I were to do 10-15 problems in the book, I would only get 2 or 3 correct and that’s either because it’s too easy or I guessed. I don’t know why I am struggling and I really need help because I want to increase my SAT score from a 1000 to a 1200-1300. I feel like my mind is so slow compared to other people and I don’t understand things as easily as others do. Can someone please give me advice or tell me what I can do?

Don’t worry I don’t understand that math at allll. Get khan academy its a website that connects to your college board account and it tells you what you need to improve in with quizzes, test and videos. On the PSAT sophomore year I got a 580 in reading and 420 in math so I got a 1000 in total… But I had only taken geometry and algebra 1. Hoping that with a tutor and khan ill score between 1300-1450. GOOD LUCK!!:)))

I am trying and I hope it does help. Thanks for your reply.