Sure, success sometimes is sometimes the result of whom you know. Still: Long-term success is almost always based on what you know.
That’s why most successful people try to be lifelong learners. And (at least try) to a research-based approach to learning faster and retaining more.
One way is harness the power of interleaving by learning several subjects or skills in succession. Other methods include tapping the power of memory consolidation and reconsolidation. Or exercising before trying to learn something new. Or, even by sleeping your way to better long-term memory and recall.