Does anyone have a tutorial on editing garage textures or anything else?

[GDMBP]

Hi, does anyone know if there's a tutorial for editing garage textures or similar? I'm new to editing the game. I have a laptop that's big enough to do it, but I don't understand anything.
If you can help me it would be a great favor to me, thanks.

 

[frlz]

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View attachment 2025-09-21 12-36-19.mp4