Congrats on your baby!
It's not unusual to skip engorgement with subsequent babies, I think.
The weight gain sounds good! You can watch intake by watching output - several poos a day (or many more!) plus some wet ones and 8-12 feeds, plus weight gains etc are all good signs.
Sometimes babies are sleepy early on and take a bit of time to get 'up to speed' so waking to feed frequently can be necessary to ensure you establish a good supply. Sounds like you're doing fine so far!