Are pallet jacks hard to pull?

I'm gonna be getting my first job in a warehouse soon, with forklifts and stuff. I don't think I'll be driving one just yet, I am pretty sure they will start me out on a pallet jack and I'll have the option to go up to fork lift stocking. I'm really anxious cause its my first job, I'm thinking like.. What if I don't know what to do, or I don't get it and look bad. I mean I know it's just overnight stocking but still. They'll train me and teach me everything I need to know right?