I have 2, 4 years apart. That first year, no joke, I was dead on my feet. The really hard part was that DH's schedule at the time was really awful and so i was doing virtually all evenings / bedtimes by myself.
I semiregularly take mental health days to enjoy a completely quiet house, take a quiet walk, eat without the kids

read and watch crap tv. I need to do it more often, actually. Just one full day every other month or so.
I prioritze sleep over nearly everything else. My Tv watching is so minimal it's not funny. My house is cleanish but i wouldn't call it neat.
"Me time" occurred at the gym (at 5am bc DH did dropoffs) and after bedtimes. Very minimal.
It wasn't too bad with a newborn... then DC2 became mobile and it was awful... then as he's gotten older it's easier and easier. They are 2 and 6 now and will play together happily and occasionally not even notice that we've left the room.