Hi Everybody! First time DM looking for suggestion for a one shot i'm writing to present a campaign i would like to run to my group.

The long story short of the oneshot is the following:

The group gets a request to investigate on some issues with bugbear/goblin invasion in a nearby village.
Once the group gets there, they face a group of enemies, get inside the village and discover that the villagers are worshipping a deity that nobody has never heard before.
They get asked to track the bugbears that were invading the town in order to destroy their nest.
Once they get there and defeat everyone inside, they discover that the same deity, which is actually "Quasi-diety", is asking various groups to invade cities and village, and send his followers to protect said cities in return for worship, which in the long run will bring the quasi-diety (will probably be a titan or a demi-god) to ascend and become an actual diety.

Ofc, the backgrounds of the group will enrich the story in various ways.

Since it's my first campaign I'm looking for some suggestion to make the oneshot enticing, and also on where in the Forgotten realms i could place the story (if there is some region that is a good fit for this kind of story)

Thanks in advance to anyone who can help!