I didn’t discover the value of mentors until later in life, and I wish I would have sooner. Mentors can help you avoid mistakes in your career (and life) because they’ve already made them and learned from them. They can give you honest advice, and support if you’re down. They can help you make connections and find jobs. I never knew how to find a mentor and was lucky enough to have mine find me.
To go deeper with someone, and ask them to become a regular mentor, many writers’ groups offer mentorship programs.