To the OP - I do feel a little stretched to be honest. I had a dream baby in DD1, but DD2 is a difficult sleeper. Having said that though, every day gets easier. I force myself to be organised to try to make the house run smoother, so I can give both kids my attention. That means cooking food at nighttime, doing a chore a day during the nap they have at the same time etc.
DD2 does get dragged to different activities but it wont be long before she is partipating herself.
I just couldn't imagine only having one child, so for me, the gamble paid off even though there are days where I just want to sob in bed