Working?

I quit my job when I was about 5 months pregnant because we moved an hour away and became a stay at home mom. And let me tell you I am not built for this and to the women who can be a sahm I give you props. I want to start working as soon as I possibly can after having baby. I’m wondering how soon I should start putting in application because I know it can take a bit before getting hired. I’m thinking 3 weeks pp start looking and applying ( I know it’s soon) but I have to get back to working, financially I have to. So how soon should I start looking. I’m currently 36 +3 and will be having him at 39.