Easy don’t move in together until you come to an agreement or 50/50. I personally love 50/50 but it doesn’t have to be exactly 50/50. For me sometimes I’ll get something sometimes she will get something but it doesn’t have to equal the same amount. Bills should usually just be 50/50

You didn’t give enough context as to why you’re working part time, get a second job or just a full time one. Don’t dive in unless you can come to an agreement just asking for trouble.