When do people usually start paying off their car loans..?

i need a car loan for a used car.i just turned 18 and i need a car for my new job, i need to start making more if i want to even stay alive but right now my guardian is handling my rent,food, the basics but not for long till i start working again because now I'm currently unemployed but i need to get an extended car loan for a used car soo i don't start paying right away for like 4 to 5 months what do i do? and i,m currently a student, i don't have any credit and i don't have a co-signer what do i do? i need helpful feedback's.