just don't. Low pay, hard work, rude people. Management will take advantage of you. if you like fast paced, no pay, heavy lifting, rude customers, and clean literal feces off the walls then by all means, go for it. There is a very high turn over rate, so even if your really bad at your job, they'll still keep you around.
if you stay there for about 20 years they'll consider making you a member of managment