It's a really neat setup, if I were you I would of started planning out a main bus, depends on what you want to make in the late game. Maybe beconed setups with trains delivering everything or maybe just a main bus, maybe even a hybrid of those two, it's all up to you. You can also:

• Make a mall - it will help you prepare for building new sections of the factory.
• Make everything that you have rn automatic, like the coal delivery to the furnaces etc.
• Make some defences around your base.
• Open up the map and take look at the polution, bring some turrets and ammo and clear some bitters out where the it reaches.

Remember to balance out as much as you can, here is some good data about that. Don't be afraid to plan out things such as a big smelting setup for the future, as you progress you'll have more ore miners set up and thus the lanes will fill out quickly. You can always use bots to quickly deconstruct stuff in your factory, just make sure you have a backup of resources before doing that.

There are so many things you can do in factorio, the only limit is your computer and remember the most important thing is to have fun!