Routines and strategies for "adult life"?

Hello, this is my first post after the introduction. I have a job that I love and work long hours but I struggle with almost everything else: buying things I need, preparing food and having enough in the house to eat, opening mail, paying bills, checking my account balance, planning for upcoming tasks, keeping in touch with family, filling in forms for insurance, contracts or applications, seeing doctors for medical issues. I live on my own now and feel like a kid from Home Alone. I don't have an income that would allow me to get myself a sitter and don't want to ask for state or charity help. Does anyone here have any recommendations like apps or certain routines that help you with keeping on top of basic adult things?