With diniesaur however... She has already stated that her emotional progression isn't on the same level as the standard for her age range would be expected; although her intelligence level is beyond that standard. So in this particular case, I would take all that into account with the minor v. adult thing.
Granted, but what I was remarking about was the blanket statement of the maturity levels of a person bases solely on age. You don't get the magical "Age of Consent" Fairy flitting down to whack upside the head with her maturity wand simply because you managed to survive to a specific calendar date.
And I did point out that I would not try and formally train a child that I didn't have consent from their parents and/or legal guardians AND I didn't get the warm fuzzies about their emotional level of maturity.
Hell there is a 30 year old that her immaturity makes me want to stop moving and pray that her vision (like the fictional T-Rex in the Jurassic Park Movies) was based on movement. She is so "fluffy" that she makes the typical "Fluffy Bunny Witches" look like they're taking it seriously she is that bad. And to my dismay she thinks I'm the "bestest person on the whole planet" (her words, not mine <shudder>) to teach her.
So in the case of diniesaur, being self admitted to being a little behind maturity wise (not that I am judging, everyone matures at different rates and we can not and should not try to force someone to do/be something that they are not ready to be), I would not take her on as a student. What I would suggest is what I suggest to anyone. Get some books and read, read, , read and read some more.
Besides as I stated in another thread, being well secure with yourself and your own relationship with the Divine helps cushion you if/when you run into Pagans who will look down on you because they're buttheads, you're different than them, and they can. Being comfortable with yourself and with the Divine means that when they do be mean, you can just say "Stuff it!" to them and go home and fire up your own altar.