The first aspect is to cultivate your hobbies. In fact, if you want to cultivate your self-confidence, you can start from some small aspects, such as cultivating your hobbies, because if you can cultivate your hobbies, you can make yourself have better behavior, and you can also make yourself want to have better behaviors and hobbies, so as to better cultivate your self-confidence.
The second aspect is to improve your ability. In fact, if we can improve our abilities in our daily life, we can better cultivate our self-confidence. Because if we can improve our ability, we will have more confidence in ourselves and enjoy our daily life better.
The third aspect is to expand your contacts. In fact, we don't have confidence in ourselves because we can't make ourselves have better interpersonal relationships or become extroverted. If we can expand our interpersonal relationship, we can know more people and enhance our self-confidence.
In a word, I think we can cultivate self-confidence from the above three aspects.