It's important for everyone to sleep well, but even more so for babies!
A healthy baby, won't have any trouble getting their required sleep.

The bed

The bed is also an important area, be sure to not get one too big, as babies, especially young ones, get afraid of this empty space around them.

If you don't have a lot of money at the beginning, you may buy a bed not top quality, but try to buy a 100% as soon as possible, as your baby's sleep won't be perfect without a perfect bed.

Your babies cannot share a bed (or a buggy, for that matter).

Once you bought the bed, go in "Sleep" (in Taking Care) to put your baby in it.