You need to sort out finances, how will this work with regard to access to money. Will you be treated like a child and have to put your hand out for "housekeeping" or justify having your hair cut?
These are usually the main sticking points, women sometimes end up with nothing, the man goes mad about the cost of essential items such as uniform or shoes or food Hopefully you have the same view on money and what is important. Plus understanding the costs involved for children, ie Dh once almost had a heart attack at the cost of school shoes, forgetting that his 12 year old son was in size 8 adult shoes and has very wide feet meaning they came from Clarks and cost £58. The last time he went shoe shopping with us Ds2 was getting his first school shoes for £22.
I have been a SAHM for 15 years and on MN for 14. Money is the biggest issue. So if you haven't already, have that conversation now.
The other one is housework. How old is your child/children? You need a conversation about expectations. I was happy to do the whole dinner on the table bit because Dh was a hands on Dad from the second he walked through the door, would happily take over cooking and took responsibility for all meals on the weekend (he loves cooking).
We alternated lie ins on the weekend. Understood the importance of one on one time with the child, ie I went out, Dh happily had both children, I went away for weekends with friends etc.
But I can tell you, it is the best decision we ever made (it wasn't planned, we moved due to his job and then it just made sense for me not to return to work, Ds1 is now 17) it allowed Dh to further his career, us to never have to worry about school runs, child care or a sick child. It has been incredibly hard at times, but rewarding. I don't have family near by so I did put Ds1 in nursery for 1 day a week, he was used to doing 3. That gave me a break and Ds interaction with other children, plus other adults.