No ! You cannot put you are a nursing assistant on resume...because they will want your license # or some proof. etc.
but you can put that you completed a program and waiting to retake the exam.
Meanwhile, you can work as a personal caregiver...
Don't EVER , EVER MISPREPRESENT credentials, because you will end up with no opportunity to become licensed or be accepted to nursing school,
You could be reported to the state board and suffer big consequences for misrepresentation!