Hi! It looks good to start off with, the other models and textures looks fine to me, especialy for a project like this Good job so far!
I’d suggest you to use a 3D character model if you want it to be multiplayer. Imagine that you’re playing a FPS game and your allies as well as your enemies are only Capsule models. That’d be strange, right? Use your imagination. Search for some appropriate models for your game. Maybe you’d like police and terrorist models for your game. Then either use animations they come with or animate them yourself
Best of luck on your projecT! May I also ask what networking solution you are using?
A name is the hardest part when making a game isn’t it? Well I don’t have a name but a suggestion. Put some lights in the map. From your screenshots, it looks like you only have one directional light. If you add a bunch of lights such as lamps or street lights, then you should use the cool feature called light mapping. It really makes the world look real. Be aware, I have always had trouble with light mapping and terrains.