Is it obligatory to delay wearing the complete legal hijab—including the khimar without covering the face—until after Ramadan or securing a stable job, in order to avoid rejection by companies and the futility of completing studies?

Allah has commanded women to observe hijab and forbidden them from displaying their adornments before non-mahram men. This has conditions that have been previously explained. One must hasten to observe hijab, and it is not permissible to obey parents or others in abandoning or delaying obedience to Allah. A Muslim does not postpone obedience to Allah, just as the Muhajirat (emigrant women) did when they promptly obeyed immediately after the verse of hijab was revealed. It is not permissible to accept work that stipulates abandoning hijab. Whoever adheres to their religion and trusts in their Lord, Allah will suffice them in all that concerns them.