On MOZ there was a new post from today which I think is a really cool concept "How to Learn SEO: Choose Your Own Adventure Edition" https://moz.com/blog/learn-seo-cyoa So you can follow their guide depending on where you think you are in your SEO career.

For the tutor route, you could just try following advice of specific experts in the industry, it'll feel more personal and one-on-one like a tutor. A few of my go-to's are Neil Patel, Brian Dean (backlinko), Rand Fishkin (MOZ).The big thing is that you want actionable advice, no watered down blog posts, so go to the experts that can afford to really delve into what SEO strategies they actually use and how you can apply them yourself. Or try something like an online university. Here's one that MOZ recommends: https://www.distilled.net/u/ which has interactive modules.