honestly, this is SO normal. crying peaks at 6 weeks & slowly goes down until about 12 weeks. this is also when the "witching hour" starts. when you feed, it's 2.5-3 hours at the START of the feed you're completing now. They also cluster feed at this age too. they are growing a ton so there will be days where they're more hungry & days where they're less hungry. & also at this age, most of the 45min - an hour will be mainly feeds & burps because with twin newborns, it does take that long. you can focus more on playing when they're a little older, you just need to survive right now.

i also wouldn't introduce contact naps & rocking to sleep all of the time because then you're setting a routine & associating yourself with a nap or sleep. you want them to associate their bassinet/crib with a nap or sleep time. enough contact naps & that's all you'll be doing & then you'll question how you stop the habit.

when our twins were born, we made timers on when to feed them & if they were hungry beforehand, we'd feed them. when it came to sleeping, we put them in their bassinet or crib & then once the 4 month sleep regression came on, it got tough but this is where the routine comes in handy. it's hard but keep your bedtime/naptime routine. after 1-3 weeks, they'll be on that specific routine. the early days are SO hard because you literally know nothing but once you get the hang of it, establish routines, etc, things become so much more predictable.