How to build a base on Halo Wars?

[merle]

I'm on this level when I have to construct a base and how do I check to see if I have ''sufficient resources'' to construct a base
. So far this is what I'm doing placing the crosshair over the one of the base sights I chose then I press a then what do I do?

 

[blazeagle21]

press up on the stick and then press "A"

what's so wrong with tutorials nowadays?

 

[blazeagle21]

press up on the stick and then press "A"

what's so wrong with tutorials nowadays?