Some of the greatest mentors are those that you don't even "get" right away. Like in Karate Kid, Danielson sought after Mr. Miyagi to mentor him in martial arts. Mr. Miyagi had Danielson paint his fence and wax his car and seemed to pay little attention to him. Danielson was unhappy, confused and thought his time to be wasted. But, little did Danielson know Miyagi was actually teaching him core martial arts strikes and blocks.
Some real estate mentors may have a similar indirect approach where you don't even realize you're getting a valuable lesson. Other mentors are just full of crap.
I would say, spend as much time around people who are at least 10X further than where you want to be because even if you only learn 10% of what they know, you would've hit your target. Example: If your goal is to make $100,000 a year in real estate, stay close to people who make $1,000,000. Eventually, you'll at least pick up how to make $100,000.
I would also suggest never paying for some expensive guru program either. It's all scams. Yes, I'm using the word ALL. Even some local experts have scam mentor programs. Conversely, at one point I paid $350 an hour for some sit-down time with a big time local investor going over his strategies. That was extremely beneficial and about as far as I recommend going in terms of payment.
Hope this helps