Please re-read what I wrote. I stated if it you have another offense it will mandate one year in jail. At this juncture, since it is your first, that is not mandate (must be) sentence. I think you could work to get it reduced or consult with a local attorney to assist you with getting it reduced to the misdemeanor.
Here is what I wrote orginally, please read it carefully... I know you are stressed, but you must take time to read what was written or I can be of no assistance to you
Charges can be amended - so that is not a defense. However, you can try to discuss this with the DA and see if you take a plea if they will reduce it to a misdemeanor. They do not have to, and can move forward with the felony. Then you can ask them for probation and community service which upon successful completion would be removed from your records.
Punishment for most misdemeanors is up to 12 months in jail. Fines for most are up to $1000, but can be as low as $300 for certain offenses.
Felony shoplifting is a 1-10 year offense. Note, that if you have a subsequent (meaning if this happens again) conviction, for either a misdemeanor or felony shoplifting charge there is a mandatory 12 months in jail.
Best of success to you with this matter,