As for my ET mentorship. I would want a female mentor because it would be easier for me. I am a male and a very wise female teacher would be conducive to instruction, although a male teacher could work too.
I would have one or two of the Andromedians contact me and take me on a short trip in a small craft of theirs. Hopefully before offering mentorship they could repair my DNA so that I could once again regain full consciousness and have full access to all my previous memories of all of my past lives. Upon doing this the mentorship could begin, although now on a level playing field.
The principle focus at first of our meetings would be on the nature of full consciousness and what full self awareness really is (awareness of awareness independent of all external stimulus). They would teach me how to use my own mind and awareness to bend space and time, and as a result, learn how to teleport, levitate, frequency hop, and commune with the universe as a whole and as one singular coherent conscious point of self awareness.
This would be a start. From there, the skies the limit.