Study requirement and study bonus

Having both the flaw and virtue does that imply a bonus to the 240 apprenticeship xp? How much would that be? Roughly 15 seasons of learning from books (neither virtue nor flaw talk about being taught in an art) - that would be ~30 additional xp?

The book explicitly allows taking both, so it is apparently not considered cheating.

No, it's not cheating. But you don't usually get starting experience from these, nor from similar like Book Learner. There are other Virtues for starting experience. But if you switch over to complex character creation, then you actually go through all the seasons and the bonus/penalty will be determined by the process.