Well Finn is her first guest as we found out in EP IX. Are Ezra and Ahsoka still alive? Guess they may help her out a bit. And I guess she’ll just look for force sensitive kids like the one we saw in EP8. Obviously being much smaller than the Old Jedi Order we won’t have a council, or definite ranks, just Masters and Apprentices
Rey would probably start off much like Luke did, and recruit a handful of Force-sensitive beings, with Finn as her #2.
And given that much of Rey's training stems from texts that are thousands of years old, she'd likely use that as the foundations for her Order... Which wouldn't exactly be a bad thing, as it would get back to the roots of what Jedi were meant to be.
Though I can't imagine Rey as of RoS trying to instruct anyone about the ways of the Force. She has a long way to go before I could see her being a decent teacher.
I wouldn't say that Rey "barely" understands the Force. She actually gained a quite a bit of experience and understanding when she linked minds with Kylo, read the ancient texts, and trained with Leia.
But I agree that as of RoS, she was in no position to be teaching anyone about the ways of the Force and how to become a Jedi. You need to have a deep comprehension, understanding, and mastery of a given subject before you can adequately pass it on to others, and Rey's just not there yet. Even Luke waited like 10 years after RotJ before he began training a new generation of Jedi, and he had amassed FAAAAR more knowledge(from multiple eras) than Rey has.