Leila believed that Natasha could rise faster with her support.
While formal education was valuable, a brain like Natasha's should not be wasted on only attending classes and doing small part-time jobs. As long as she had a chance, she would do better than second generations like Amelia.
Of course, nothing in the world was free, so Leila would not help people out of the goodness of her heart. Those who gained benefits without working for them would never achieve true greatness.
If Natasha was willing, she would offer her support to help her achieve her dreams. However, before she could make such a proposal, she had to know she could trust Natasha with crucial secrets.
If Natasha was interested in joining her and could be trusted, they would come up with an official contract.