I don’t think that there is a good answer.
As opposed to just getting access by virtue of where you were lucky enough to be born or how wealthy your parents are?
Conscientiousness is the personality trait of being careful, or diligent. Conscientiousness implies a desire to do a task well, and to take obligations to others seriously. Conscientious people tend to be efficient and organized as opposed to easy-going and disorderly. They exhibit a tendency to show self-discipline, act dutifully, and aim for achievement; they display planned rather than spontaneous behavior; and they are generally dependable. It is manifested in characteristic behaviors such as being neat, and systematic; also including such elements as carefulness, thoroughness, and deliberation (the tendency to think carefully before acting)
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With the advent of the FFM (Five-Factor Model), behavior geneticists began systematic studies of the full range of personality traits, and it soon became clear that all five factors are substantially heritable.
Overly simplistic summary: Intelligence is how quickly you can learn, how well you learn it, and how well you retain it.
Learning skills has to do with meta-learning and how you're taught to learn. Liquid intelligence is a skill that can to a degree be taught. Retaining knowledge has quite a bit to do with how you learn it. Some people are gifted and remember everything by default, but for everyone else there is meta-learning.
Of course, I'm being overly simplistic, due to intelligence being a complex topic, but the point is, intelligence isn't all genes. If you want to increase your intelligence, you can make that a hobby.