How to Become a SAHM

Hi! I’m due in three months with my first baby and if all goes well will be out on maternity leave for 5 months after she is born. I have always wanted to be a SAHM which my husband fully supports. I’m trying to take a look at our finances, create a budget, etc. to see if this is something that we could really accomplish. We’re a bit in the dark as far as baby expenses are concerned! I’m looking for some advice and/or ideas from the SAHMs here on how you were able to transition to stay at home with your babies. I really appreciate the help!