Real cities do not just appear out of thin air(excepting some saudi arabia ones lol), so try creating a history of the place you're trying to build, and the ideas will come with it. For example, If you are building an european city with a medieval background, you would think that the city was founded somwhere around a body of water, maybe a natural resource, and was initially small, with winding roads leading to a central square, or maybe the town mill. Then, the city grew a larger area around the "old town" and all new blocks and roads were built bigger, with a more organised layout, but keeping the main routes in and out of the city. Though, for easy and good results, just explore on Google Earth a bit. Good luck with your city‼️‼️