It seems you are either 1) a student with a big homework assignment (or project) or 2) you have deceived your employer into thinking you know PL/SQL but really have no clue.

If the case is "1) a student", then in order to learn something, you should actually try to do the work yourself and request assistance when you really need it.

If the case is "2) a deceiver", then you should resign out of moral/ethical (and maybe legal) grounds.