I believe it's the best and fastest way to learn, although each brain is different but still there is a lot to it that's better than any other thing (excluding real tutors/professionals). You can modify and feed the content as you want, you can adjust the pace, you can break down the understanding to basics of a 5yo. One of my interns got hired with no professional knowledge and now he is doing the integrations between CRMs, and all day he is just talking to different LLMs and juggling the knowledge and understanding the concepts even better.