Colored my 2nd ON stocking shift

So just did my 2nd ON stocking shift and idk if this is normal but they put me by myself with 3 pallets no one was around me dint see anyone for hours got 2 done by 5am and the 3rd 2 people came over and helped out I don’t know how to get any faster at stocking on my first shift I was with my trainer but all they showed me was how to scan items and then went on doing their pallets she was their if I need to ask stuff but after an hour or 2 I think she went all the way down the aisle to another pallet so if I needed help I had to walk all the way over their they also had me zone for an hour at the end of the night had to figure that out still don’t really get it first retail job