Dont be too worry, you might have to pay court fee, and most likely since you are underage and it's your first time shop lifted you will most likely do volunteer work and some sort of probation! As for the lawyer part, when you get to court that day, people inside the court room will say something like "Does anyone need a public defender?!" and that is who you need which is a public defender that will see what your income and they will give you the lowest fee possible (free of charge) for the case. Dont worry too much!!! GOOD LUCK!!!