I would recommend focusing on maths and physics in A-Levels and enrolling in an engineering program at University. Try to get involved in doing some experiments too – it’s very fun and you will learn a lot about how maths and physics apply to flying bodies. For example, have you ever built a model glider? There’s so much physics in the balancing of a glider that is used by engineers to develop airplanes every day!
And of course – be curious and ask questions!!