first I think you need to level up than either make tons of airs and sell em' or mine iron and coal either sell them raw or smithh em and sell them after making a mill or 2 merchant
Lol wanna help but since I've come back I'm not really sure, also the economy by the looks of it may be a little unstable b/c of the new 3rd age stuff. Back in the day though iron arrows, runes iron ore and coal were always good though.