A person who knows how to solve problems carries invisible equipment everywhere.

Problem-solving ability is not attached to any particular domain or situation. Someone who has it arrives anywhere already equipped, because the equipment is a way of approaching things rather than a set of objects. It cannot be taken away and does not need to be transported.

Invest in the general skill rather than only in domain knowledge. Practise breaking unfamiliar problems into parts. That capability follows you into every situation you will ever be in.