Op - my DS is 20, we got max 6mths ML back in those days, so he was in nursery from 6mths old, albeit only 3 days/wk. DD followed 2+ yrs later, despite being born with a serious heart defect.
Maybe I am an awful mum as I never felt selfish!!!
But - both have survived it well! DS in his 2nd yr at uni, lots of friends. DD just finishing college, very social. Both lovely young people (albeit with a few teen tantrums 😂😂😂)
Meanwhile I am still working 3 days but more importantly am still relatively sane, which I know I wouldn't have been if I hadn't carried on working. I also have a reasonable pension to look forward to, thanks to continuous work.
We also have a good amount of savings, for same reason, meaning DC have a comfortable life eg we can help them with uni, bought basic cars when driving, planning a NYC trip later in year for their 21/18 birthdays.
Both he and you will survive and settle into your new regimes. Just dont compare your life with anyone else, particularly with different/no childcare.
We have a close friend who was made redundant when pregnant. Her DD and my DS born a few days apart. She put all her energy from work into being a SAHM for a few years. I used to wonder if there was something wrong with DS - as her DD did alphabet jigsaws at 2 and he just stared at them 😂😂. 18yrs later and he is definitely more well rounded as a person than she is (and knows his alphabet!!!!).
A different friend said at the time - maybe the SAHM (who always planned to work FT) envied my good fortune in having a career to carry on.
You will both be fine!