Hey Col_Jessep!
It can be difficult to get enough children without migrants from what I've heard.
For me this wasn't a problem after socializing the dwarves for a longer time, everyone was married and I had 80 dwarves (including many kids) in my last "working" (no migrants, no trader) 0.34-savegame.
Other than that you need to think of resources you need that you can't easily make yourself early on. You will need animals for leather and bones, sand to make some glass and nets for silk. Without those you will run into trouble with moods. Best to bring some sheep and find the 1st cavern soonish. Dig a nice, large room on the same z-level as the first cavern to gather nets from cave spiders. You should only embark if you can find some sand and iron ore though.
I had all these thoughts before.
I am not doing this for the first time.
But I fear that I can't create such a world again without getting the bug that migrants and traders will still show up. :/
You can trade some important things from human caravans.
Have a look at the World-info I posted. There are only goblins and some kobolds.
In the near future of the 2nd century (year 125), there is only war.
A river is not a bad thing either. In my last fort I had a moody dwarf who wanted shells. On a mountain. In a desert!
There is a desert in the middle of the map. I'll embark there but first I want to make things sure about the trader-migrant-problem I am talking about.
If there is no way to handle the problem I won't start a new world and have to wait for the update to fix this bug.
*edit* I thought it was a desert. It is a terrifying ocean/lake.