Suggest me. Pls

[KEnough]

So can some of u know I make video games in my free time. And I haven't finished any one of it. Yeah not a single one 😩 .
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There r many youtube videos of game making tutorials but they r just to get started cleaning basics.
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I just figured out a problem or a skill I lack, which is visualizing the map. I have made controllable cars, characters. But I failed to make and visualize maps for them. Which is a big part of the game.

Look at this awful plain surface. -_- .
That race car is fully functional but runs only in this stupid plain surface.
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So if u r gamer or good at visualizing. Feel free to suggest me same maps. And if by any chance this game made in to public platform.... idk play it by yourself then.
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p.s. if few people shows interest in this topic. I have few more unfinished games (basically just movable characters on a plain surface), which would be good if they have good maps also I didn't made that car from scratch I just took it from a free 3d model site, https://kenney.nl/assets?q=3d check this if u r into 3d models

[justB]

The map depends on the game genre. If you want to make a racing game you can always go with a circuit in various conditions like forest, city, offroad.
Try to play a game after which you want to resemble your game. You can start creating basic things, like streets, trees, buildings