Quitting job to study for mcat

hey everyone I work as a nurse, and prior to getting by BSN, i obtained a bachelor's degree in biology - taking most of the prereqs needed for medical school. not only did i not do extremely well (getting mostly b and c's), but it was also a long time ago - last class 12 years ago. needless to say, i dont remember anything anymore. but i do know that when committed and dedicated, i can teach myself anything. so my plan is to study for the mcat and hopefully reteach myself everything. do you all recommend i quit my full-time job? i feel like its the only way i am going to get this material in a reasonable amount of time.