I agree with Atty DeMateo. If you have no prior involvement with the Criminal Justice System you ought to get this ultimately dismissed. Depends what court it's in you may be able to resolve it with a charitable contribution and /or Community Service.
I never admitting a crime again on an open forum like this. Good luck
Your question is whether you should get a lawyer. Anyone accused of a crime should have the benefit of a competent lawyer - private or public defender. They will maximize the odds of your getting the best outcome possible. This could include some less formal penance in exchange for the case being dropped.
As you are on disability, you will presumably qualify for a public defender unless you have valuable assets. Typically, a court would require someone to obtain counsel when they are charged with criminal conduct. Self-representation in the context of criminal accusations is not a good idea.
My answer to your question is not legal advice, and, it does not form an attorney-client relationship, and, it is not confidential. If my general insights suggest to you that I may be able to help you with a specific issue, then please feel free to give me a call.
C. Christian Young, Esq.