Should I hire an attorney in my case?

You are almost always entitled to represent yourself in court, as long as you are found by the judge to be  ‘mentally competent’ to do so.  Whether you should represent yourself is a different issue.  The conventional wisdom is that an attorney will be able to do a better job and get a better outcome for you. Prosecutors and judges don’t like dealing with ProPers [people representing themselves] unless you are simply pleading guilty, not defending the case.