Review Detail of Tartarus in I became Haruno Sakura?

The mc is too carefull and everything can became the reason of slow progress. So useless and didnt different much than real sakura. Forgeting your age can became one of the reason for his/her parent to became suspicious of him? Damn, sometimes i forgot my age and need to ask my parent to remember it lol, would i be killed if i am in the world of ninja?