Find problems you care enough to become capable of solving.

Capability follows care more reliably than care follows capability. When a problem genuinely bothers you, learning what is needed to address it stops being a discipline problem, because the motivation is coming from the problem rather than from you.

Rather than asking what skills to acquire, ask what actually bothers you enough to work on for years. Start there and let the required skills reveal themselves. The order matters more than people think.