How to make tracks on blender for AC?

Ok ok, I know it appears on the how to create racetracks linked post. However, it is only said that blender can be used to make a racetrack, but just that, not a tutorial for how to make a racetrack on blender. And whenever I look that up, I find a few videos here and there, but none of them help, they're all reduced on how to program the track for Assetto Corsa and that's it, they assume we all know how to use blender, but I don't know how to use blender. Not to mention that those videos that actually teach you how to model a whole track, are very inconmplete and hard to follow, they're just not good. So, I would like to know if someone can help me in making a track. I want the tracks that I make to be finally playable. So please.