The question is whether it's going to be worth it FOR YOU.

I do it because I really do just want to help. I've left mentor duties on one role and requeued for that specific duty as a tank or healer just to help. I'm one of the most patient people you'll find. I'm also not going to push my advice or playstyle on others; I'll offer advice if it's asked for or if there's something actively hurting the party or their progress. I try to be an example of a good mentor by my standards.

You have to decide for yourself if you're going to do it, and what kind of mentor you're going to be.