Im eighteen. Got kicked out. What do I need/Need to know in order to rent an apartment/duplex?

So i'm eighteen. Just got done with high school. My mom kicked me out of the house...so my boyfriend and I are looking for an apartment but preferably a duplex. We both work almost full-time so money is not really an issue but still is. I don't even have a credit card, not sure if that really affects renting? I'm pretty much still a baby and I need help/advice! This is my only option so it's what I have to do.