I’m going to be honest the first few months are tough as new parents ! There’s no illusion lol. The first couple weeks your in this little baby bubble where all you both do is stare at this beautiful baby that you created. More often than not the partner / husband stays with you in those weeks & helps as much as possible & then he goes back to work & your left alone & the bubble pops lol. The funny thing is before baby comes, like you say your more worried about how baby will effect you two as a couple but once baby arrives your main priority isn’t your partner anymore. Everything becomes about baby. You don’t intentionally push your partner away but as a new mum you have this overwhelming urge to keep that baby safe & happy so naturally your partner gets pushed to the back of the queue which I think a lot of men struggle with.
I found my first the hardest to adjust to as it’s a complete life change. It’s something you’ve never done before. Don’t get me wrong it’s amazing but it’s just different I guess & it is hard to find time just for you two in those first few months but as baby gets bigger & less dependant you’ll both find you can spend time together again. It depends on a number of things really - how many babysitters you have? if you even feel happy leaving baby with anyone else? If you breastfeed thst may determine how long you can be away for. And then you think you want time just you two & the whole time your away you just miss the baby & want to be back with them lol.
Nothing can prepare anyone/couple for their first child & even though there may be tough times you wouldn’t change it for the world. Just enjoy every moment. Mine are 8 & 4 and you spend loads of time wishing time away when they are babies, wishing the colic would end, wishing they could feed themselves for just 5 minutes, wishing you could enjoy a bath longer than 10 minutes, wishing you could just “pop out” like you used to without it taking half hour to just get out the house etc.. but now I find myself looking back at old pictures / videos wishing they were small again lol. Hence why we’re having a third I guess!
You’ll be fine though. You’ll have good & bad days but as a couple you’ll find your feet & it’ll work & before you know it you’ll be 11 years down the line with 2 more