OP. Look at your photo memories on the phone. Look at your child 2-3 months ago. How different do they look now? You will never have them full time to yourself again, ever. Once they start schools - that's it. Even the time during the school holidays will seem to pass fast.
Our nursery days used to be: wake up, rush to get out of the door. Check the Bub's day via uploaded nursery photos. Home, dinner, bed. Repeat.
Now my 19 months old stays at home with me, we have slow mornings, I decide what to do that day, we sometimes cuddle on the sofa watching TV, or we go to the beach 3 times a day; there's no rush. I cook different meals, we travel to so many activities: the zoo, the museum, playgrounds. He does something new everyday and it makes me feel so happy that I get to see it all.
The kids are too young for nursery at this age: they can't even speak, they can't even go to the toilet by themselves. They're completely dependant on mum. Yes many posters will tell you that 'their kids love nursery', but humans can adapt to pretty much anything. Those kids were just made to adapt. Mine eventually adapted and loved nursery too. But I wholeheartedly think that he's happier now that I've pulled him out.
It's completely fine to send them to nursery if you have to work (my mum sent me at 8 months and I'm totally fine), but you're in a fortunate position to enjoy those adorable first years.
(I did start an online Master's degree PT to keep up with my industry so that my career doesn't suffer. It's been doable when DH takes our son out without me).