I forgot everything from EMT school. Please help!

Hey yall so I completely forgot everything from emt school. I did an accelerated program and subsequently passed and passed the NREMT and got my state license. I dragged my feet for a year and have done nothing and I want to get a job now in ems but feel like I forgot everything. Does anyone have any recommendations for studying and relearning information to hopefully re-grasp everything and apply for a job? Thank yall!!