I agree with the above poster once you have your little boy In your arms you won't care. You'll build a bond and have some amazing times ahead.
I have two lads and a little girl. My girl is into reptiles, sciencey experiments, hates dresses, pretty bobbles and dancing. Likes getting muddy and prefers leggings and wearing her eldest brothers t shirts.
One of my lads loves disney, performing, dancing, anything glittery, elsa dress up, singing, clothes shopping, shoe shopping and fluffy animals. He is what most family picture what my dd should be like.
My other lad prefers books, art , history, biking and going on nature hikes, is quiet, thoughtful, tidy and is totally opposite of what everyone says boys should be.
As they Grow you'll bond and find mutual interests - you'll make some wonderful memories and I can assure you it's a joy to experience them becoming there own person.
(Plus you can get some lovely baby boy clothes - think frugi, boden, Toby tiger, little bird if you like a bit of colour!)