Ok first thing you need to understand is when the SEED lander starts up. Your people are in orbit and are awake looking at thier new home, breathing air and eating food.
You got till turn 11 to have the following
1.) a Tube going down one level.
3.) your factory building more robo dozers
4.) Robo miner mining.
5.) your digger going down a level and expanding it.
2.) space cleared for the essentials
a. Chap -they gotta have clean air
b. Agridome -Food
c. Robot command
d.) warehouse
e.) storage tanks.
f.) Spew
Chap and Agridome are first. Always.
A+C
RF+P
++S+Tube
WM+C
T+E
A= Agridome
C= Chap
R= Robot Command
W= Warehouse
S= Seed Lander
F = Seed Factory
P= Seed Power
C= Command Center
M= Seed Smelter
T= Storage tanks
E= Spew
Now on your lower level...you should have the following by turn 12
1.) A digger expanding
2.) Enough Room for two residence.
Now each turn is one month. Your first five years are going to be the hardest on the colonist because its an alien environment. Moral will be low, birthrates will be high because of the survival mode everyone is in....and it will take a steep drop once news of Earth being destroyed is received. The first 7 years of the game will be the hardest...because unless your lucky...you will be fighting against resource consumption, population control, Moral, and various other things.
Just remember, children born after planet fall will not be avalible to the work force until they are 14 years old (i think)