What can I do with my high car payments?

I'm 20 years old and I got to college, recently my new boss fired me and now I'm unemployed I've been tryin my hardest to find a job but I guess people don't like to hire me cuz of my school schedule but I'm still looking for a job. My current car payments r 546 a month and it's now leaving a big hole in my pocket I love my car I really do but I just can't make these payments anymore galpin ford is where I bought my car and they r offering me an appraisal but idk how that works all I know is I have a year and three months left to pay my car off but I need to lower these payments ASAP cuz wih no job I don't want to get my car repo can someone give me advice on what I can do to lower my payments or should I try to take that appraisal