(MC POV)
Tsuki was definitely a genius, even if I may be a little biased because of her relation to me.
I suppose from her time as a leader of a corporation, she has learnt to adapt quickly and make use of her skills and the resources given to her to the best of her abilities.
I had expected her to take at least a while to understand the basic concepts and rules of cultivation, but apparently she had figured out most of it herself already. All she needed was someone to confirm her hypothesis were correct and guide her on the next steps she should take to improve herself.
In some cases, she already figured out the rules herself and just didn't know those rules had a name attached to them. So I would end up explaining something and Tsuki telling me that she actually knew about it already.
Thus, with my instructions, her cultivation quickly improved by explosive amounts.