My name is ***** ***** I am a criminal lawyer.
First of all, when you have been charged with a crime, the last person on earth you should be speaking to is the DA. He has charged you, he believes you have committed a crime and that he can prove it, and he's not your friend. If you want to try to get the case dismissed or if you want the best chance of a deal with a non-incarceratory sentence, you should get yourself a criminal lawyer and let him or her handle your defense in some way that can't be used against you.
If you can hire a lawyer, you should do so and have him with you on your court date. if you are not able to afford to hire a lawyer, you can go to court without a lawyer, plead not guilty at your arraignment, and ask the judge to appoint you a public defender. The judge will adjourn the case for another date on which you will meet your lawyer who can take it from there.
This may be a case you want to try, as the money you took and spent, you spent on your brother's needs. But assuming that you want a deal, probation is not at all unreasonable under the circumstances you have described. This is a non-violent case and the complainant is a family member who would rather not press charges. There is every reason to believe that if you want a non-incarceratory deal, your lawyer will be able to negotiate that for you.