Welcome, Cervantes! I think we can come up with some ideas. I think Kelerak is a great place to start, since it is very developed, and it is also on the border of occupied Zeland. I think a good starter adventure might be to have the PCs be hired as low-level mercenaries by a captain of the Kelerak military. He could send them to reconnoiter the border, maybe to have them check out the enemy defenses at the Stone Ford. Perhaps rumor of massing forces has been heard, and he is generally sending out scouts and spies to see if it is true. The heroes can have some fights with goblins and orcs, find out that some sort of invasion force is indeed massing, and be hired more full-time for the Captain. You could make this part of a larger story arc wherein the heroes are involved with an ever-widening war as the Lord of Sloth tries to retake Kelerak.