[quote=@ZB1996]
[@Frengo]
How will expansion work? I was hoping to expand eastward rather than west.
[/quote]

You'll simply state that your peoples settled somewhere, set up a city, killed or drove off whatever inhabited the land and BOOM.

Either update your map at the end of each turn, or the fifth - unless of course you think you may be conflicting with someone else's' designs. 

Looks like your peoples wanted to establish complete control of their island, and begin preparing for colonial expansion by establishing the right infrastructure for it.