Help this soon to be working mom!

Hey ladies!! Ive been a sahm for 5 years now and my SO and i thought its time for me to start working to begin a new chapter in life and get a new home to call our own. We decided to work opposite shifts until school starts so one of us can be with the kids at all times. I rather them be with one of us than daycare since we dont really have family help. Anyway, can you ladies give me tips and advice. How do you get in your sleep? How do you manage your time? How do you plan your days?? Anything you learned along the way will greatly help! Thanks in advance. Im so excited but scared at the same time since im used to being at home.