The following guides are supposed to help whenever you don't understand something.
Alternatively if you're stuck while playing, just click on the information (i) button, which can be found on the upper right corner in every window. That button will lead you to the guide database.
The basic options are always available by pressing Escape, regardless you're inside a base, or on the terrain.
Pages in category ‘Game guide’
This category contains only the following page.