Here are a couple of considerations for the town that will help you add flavor to it.
Why did it arise where it arose? What are the main natural resources available and how do the effect the layout of the town and its contents?
Here are two contrasting views on your town:
1. It's a fishing town where a river runs into the sea. Thus, the town looks very roughly like a T, with the cross bar being the coast and the leg being the river; the crossbar is exaggerated since most everyone works the sea in one way or another. There are docks for fishing boats; the town has shawshankers, netmakers, cordwrights, boatwrights and similar professions. There are a few outlying farms, but most people just grow a small plot of vegetables. Maybe there is a cult devoted to sharks or sea lions (the D&D type) or dolphins.
2. No, actually, it's not the fish that drew people here- it was the gems that wash down out of that nearby mountain chain via the river. The town is thus more focused on the river than on the sea. There are significant Wild West elements, with claims to parts of the river and the claim jumping one would expect. Also, because the main industry is very lucrative, there are bandits and the like, which means the town supports weaponsmiths, mercenaries, etc. Obviously, jewelers, too. The demographics (assuming the standard racial tropes apply) are probably weighted a bit towards dwarves (wealth!) and gnomes (traditionally seen as fine jewelers). Probably there are rival communities not far away (again, all those gems attract a lot of attention).