as someone with 6 yoe and who considers himself a decent developer, I am looking for ways which can help me to be so-called expert developer-- I don't mean to s

as someone with 6 yoe and who considers himself a decent developer, I am looking for ways which can help me to be so-called expert developer-- I don't mean to say it mockingly. Genuinely interested in the advice which can help to gain more than I will on my own with my current trajectory.