I've had cats a few years now. But kittens are more recent. One of my cats had her first litter of kittens when i was about 18 weeks pregnant.
I kept them ones. Unfortunately they have just been rehomed but due to our financial circumstances. They were so easy to litter train as i started as soon as they were mobile.
All cats have their own personality. Not all attack you. None of mine ever did. I think it's more when they're young and playful.
They never messed anywhere in the house other than the litter tray (except the odd accident whilst litter training)
While pregnant touching any form of cat poop or wee is a big no no. But i doubt you would anyway, pregnant or not. I just wore latex gloves while cleaning the litter tray.
Smell is more down to regularity of cleaning. If they can go outside, ditch the tray altogether.
Just be careful with baby things. Before baby was born they had a habit of sleeping in the moses basket. They were kicked out instantly and i wouldn't let them in the room with her til she was out of the basket. And they were banned from bedrooms anyway. (More to me not liking sharing my room with them than anything else)
Looking after a kitten whilst pregnant isn't easy, but once you get the hang of it, it's nice. Tilly had 3 in her first litter and i used to sit on the settee at night with all 3 on my bump!
She went on to have her second litter when Angel was 2 weeks old. By 4 weeks i was bottle feeding them due to her rejecting them.
Now she has just had her 3rd litter. So i have a free one available if you want one
Anything else i can help you with i will try my hardest.