ProMods

Hello, I'm dont speak English very well, but it is fine, ok, how the title says, im want to make a prefab, for my new project LatinRoads, I want to start up the beta very fast, but in euro truck simulator 2 aren't many prefabs of Latin-American roads, so, im want to make it myself! but im dont know how to import these in the mod file, how I could do them?

You need to learn how to work with SCS files in Blender - so you have to read various tutorials and experiment step by step, until you understand the process. Creating prefabs is an advanced skill.

I'm don't could find any tutorials on google if you know some please tell me.

If finding tutorials is too hard, then I'm not sure if modding is something for you...

I went to YT, searched for "ets2 prefab" and the first video seems to be what you're looking for. Took 5 seconds. So I doubt you spent hours on research or experimenting - and that's what modding is about. Trying for hours before asking specific questions, when you're really stuck with something.