I agree with find nursery first. We booked ours while I was still pregnant and wait times can be a year where we are. We booked the start for when baby would be 9 months, but then decided I would take a year. I just had to email with notice to let them know we were delaying the start and that was that.
Nursery place now, worse case scenario return to your current job until you find something suitable
I would say find a nursery, figure out hours/ days then try find a job that can work around that. If you struggle to find a job and need to cancel as long as give a months notice you’ll only loose the deposit/ holding fee.