Transitioning to SAHM

I currently have a 2.5 yr old and 8 month old and have a successful career. I was fortunate enough to go back to work part time after my recent maternity leave however I have had a feeling that it still wasn’t right. I just feel I need to be with my children but I’m honestly scared to make that transition. I have worked really hard for where I am, put myself through law school and landed my dream job but it pales in comparison to being with my girls. I know in my heart I need to be with them and our family is fortunate to be in a position to allow me the option but it is still scary. Any advice from those that made the transition???