Can I be a good muslim woman without a hijab?
Not wearing hijab is like any other small sin; we all have our sins. You can still practice Islam and plan in your heart to one day wear the hijab when you have the strength of character to do it. But there is no way to be a perfect Muslim as a woman without wearing the hijab because your submission to God will always be flawed and lacking. There is no way out of this situation without wearing the hijab, since wearing the hijab is an obligation and there is no way to make it go away.
But God is merciful and forgiving and He may accept your excuses if you sincerely wish to wear the hijab and plan do it when you can. But this is not an ideal situation to be in, since we must all strive to be as perfect in our faith as possible.