Update:
Good morning everyone.
Just wanted to update those who may have similar issues in the future.
The car ended up leveling out somehow. I didn’t change anything and the
miss at idle basically vanished. I still noticed it would idle down
after starting, but then the problem all but vanished after it was
running for a few seconds and it would never turn off due to the idle.
The problem might have been the computer relearning the car. I only put about 400 miles on it.
The car passed smog and it has already been sold. I appreciate all the help I received!
p.s. most importantly, the baby is doing great!