2 Under 2 and Sleep

[SunnyRoseSloth]

Hello :)
My oldest is 21 months old and youngest is now 12 weeks. My youngest has been very needy (as expected in a newborn) meaning she needs to be held for naps and nighttime sleep.
I'm just wondering if anyone has any experience and if the youngest will end up adapting to nap anywhere? My oldest never did but I'm not sure if this is because I was too precious of naps and fixated on it too much.
Currently working on trying to get my youngest to sleep at night in her next to me

Swaddle and just put her down fed and comfortable. My DS is 12 weeks too, sometimes he cries immediately when I put him down, sometimes he lasts 10mins, sometimes he lasts 2 hours. But I keep putting him down, eventually he will get it.

@dontcomeatme thanks, will keep going :)