How do I find a mentor that has lots of experience doing this stuff?
Online and also in person.

Somebody who knows what they are doing for a long time now.
There are few trading mentors here in the bitcoin forum that are giving reliable information. Actually, I have a mentor before and it is the reason why I able to handle the risks in the trading. But it is hard to find a mentor because some of the mentors are asking money in exchange of their lessons and information that you can learn.