Would definitely recommend going back part time at first if you can. If you make a request for flexible working your employer basically has to accept it and if they don’t they need to prove why it’s not possible for the business. I did 28 hours for the first 12 weeks to help transition and found it really helped x Good luck x
Childcare wise - Knowing my son was with my husband and family whilst I went back to work made it easier. Work wise, I went back as part-time this allowed me to have mornings with him and eventually went back to full-time.