If you are convicted of a criminal shoplifting offense, that charge will appear on your record unless and until you obtain an expungement. Given your age, there may be a diversion program available to you, or the court may be willing to consider sentencing under the Holmes Youthful Trainee Act (HYTA), so you can avoid a conviction. It would be a good idea to at least consult a lawyer, even if you ultimately decide not to hire a lawyer. You may also be eligible for a court-appointed lawyer.