dollyanna, hugs. I am in a similar family planning state, and I know what you mean.
sleep: DS will be 2 months on Wednesday. His routine is fairly predictably:
Nights (10pm-7am): He is usually down from 10pm until about 7am, waking once or twice in there. It is glorious. My first did not sleep anywhere near this well.
Days (7am-5pm): During the day, he has an early morning nap, usually from about 8 until 9 or 10am (I often join him for this), a midday nap (from 11am or noon until about 1pm), and then a longer afternoon nap (usually 2-4:30pm or so, sometimes with a waking in there when I have to go collect DS1 from school.)
Early Evenings (5-7pm): About half to one hour of this time period involves sleeping. The rest is fussy, "No, don't put me down! Wah! I'm sleepy but I don't know what to do about that!" I have become reasonably good at cooking with him in the sling.
Later Evenings (7-10pm): Fuss fuss fuss fuss fuss micronap fuss fuss fuss micronap fuss fuss fuss fuss fuss fuss exhausted micronap fuss fuss (cluster-feeding the whole time.)