This is a bit of a minefield really - it depends so much on you and your personal approach to parenting vs. Financial need vs. Career priorities
I’m self employed so was back to work (of sorts) within about 6 weeks - but I kept my baby in the office with me (I work with my husband, we have our own biz) so I didn’t have to leave her and could go home if she was poorly etc.
We put her in childcare with her aunty for 3 days a week from about 4 months old. Obviously having a family member care is very different to finding a nursery you trust
I found quite a lot of YouTube videos of women In the USA describing how they managed to pump milk while at the office - many offices do seem to provide a private space, but some women had to go to the loos. Their commitment was so so impressive
It’s impossible to know what kind of delivery you’ll have - to stay on the safe side, I would personally want at least 6 weeks of no work at all, to account for recovery and bonding. Some people are still bleeding at 6 weeks though, you’re certainly not totally ‘over it’ by then 
Are there other Ex-pat Working mums locally who can share what they did, and advise you?
Out of interest can I ask what country you’re in?