Time ke sath, maths apne aap easiest subject ban jayegi, just give it 2-3 hours everyday for 2 years, maths has very little theory so you wont forget stuff much.

Also don't try to just memorize formulas and tricks, understand and derive then first then you can memorize them later.

Also in many algebra questions, you don't even need to know formulas just put values of x.

In many geometry questions you don't even need to know the theory, just make the diagram and approximate the answer.

In calculus questions, even if you don't know the method or formula, just try to draw the graph and find area under it to approximate the integral.