how to learn how to tackle maths/physics questions with "right" methods

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I am in England doing A-Level Maths and Physics.
I research the concepts I'm meant to know, the binomial theorem, Young's modulus, trigonometry, kinematics, I understand the concepts.
However when it comes to practice test questions even the easiest ones I cannot start because I have no methods to go on. Only the easiest stuff like "Hmm you have the (1 - 3x) equation now work out (1 - 0.06)".
I try searching YouTube but got nothing maybe because I wasn't searching correct terms.

Where am I meant to find suitable methods that work most of the time and otherwise are easily adapted? Issue is I have no idea where to begin.