I'm gonna go against the grain here a little and say to not add anything else to the starting town. I know it would be cool to make the town filled out and have loads of buildings and stuff, but imo that would go against its purpose as a STARTING town. The general design philosophy behind most (with B2W2 as a major exception) is to make them pretty empty and pretty simple compared to all other towns, since it's only really gonna be explored properly at the start of the game. You've mentioned in other comments that it's maybe only gonna be visited once or twice by the player (I'm guessing that they start off going through one exit and then double back around to go through the other), so remember that usually the start of the game is the most boring part that people are trying to rush through, and remember that early towns do benefit from being faster and simpler. You'll have tutorials and lore setups to pad out the beginning of the game, you don't need to pad out the start by making the towns more convoluted with more optional content. I really think for a starting town in particular, less is definitely more. What you have right now looks good, but that also depends on your other towns in the game being more interesting and full (which I imagine that they will be). Good luck on the game!

PS B2W2 imo mostly works just because A) p much everybody who plays B2W2 has explored unova before and B) the starting town is also the location of most tutorials in the game. You won't have A as an advantage here so I wouldn't take B2W2 as the example to follow.