Looking for Fantasy Books With One Female Lead, Transmigration Optional 求单女主 玄幻 穿越可有可无 的书

A genius protagonist who's devoted and not a self-righteous do-gooder. A System is optional, but if there is one, it shouldn't directly grant cultivation. It can provide items instead. If the protagonist has a special physique or something like that, getting items to improve it should be painful. The protagonist needs to work hard for their progress.