I am on two years of probation, I have a hard time finding a job to pay fees, is it posible to do jail instead?

Also it was a 3rd degree assault felony which got dropped to class A misdemenor, if I can't pay my fees and get revoked, would it go back to felony, or will it stay as a misdemenor class A, I have a hard time getting a job and don't know how to pay all fees and I can't even make it to my classes because no transportation, please help me with some advise I only been out of jail for a month and already did 3 1/2 months in county so please any help would be appreciated thank you!!