Should I quit @ walmart and if so where could i work next? :)?

well i have a meeting with a manager tomorrow and apparently ive missed 2 shifts so im thinking im done for , i actually kinda like it working there the money is good 9.10/hr, breaks are good... im starting school so i was going to reduce my hours to like one day on the weekend so should i quit and try and find a new job? ive only worked there for like a month so can i quit yet?? i want to try working maybe in a restaurant? or would that be sucky? mcdonalds? -.- idk grocery store?