Absolutely, it's one of those things where you're truly thrown in at the deep end, so to speak, with no guidance or experience (you likely remember little to nothing about your time as a child in those early years) and have to work it out.
Nobody teaches you anything (besides some basic courses for new parents like NCT here in the UK) and there's really no-one to ask; your own parents likely did things very differently to how you would now, so you have to weigh any advice they can/do provide.
The biggest help, I've found, on all sides, is talking to other parents; those of our children's friends, and we're quite friendly with a bunch of them having spend a lot of time talking to each other during COVID and meeting for the children's play-dates after. Many of them, like us have two children, with a similar age gap, their eldest is the same age as we met at our first children's births and they go through the same phases at roughly the same time.
Sometimes you just need to ask, "is this normal", and they'll corroborate, and some times you just need to support them by confirming you have the same challenges.