Also, check for any cultural or contextual nuances. Since the book is about relationships, it's important that the advice is culturally sensitive and applicable to diverse audiences. If the book includes various perspectives, that's a positive point.
Titles involving "Kissing Lessons" are common in amateur fiction communities. If this is a specific story, it is likely hosted on platforms such as: (often the source for viral YA romance). Archive of Our Own (AO3) Similar Published Titles: it starts with a kissing lesson tara tainton