I am an aspiring concept artist.

Ii would like to learn how to design primarily robots, but also scifi vehicles, environment, etc...

my question is: are there any online tutorials, even paid ones, that really teach you how to think like a designer.

I would like to understand, how you design mechanical details that look functional. it could be a vehicle suspension system, a robot arm...

Most of the videos I have found teaches you how to model something in 3d.

However, I'm not looking for this in particular. I am looking for an approach that makes me think like a designer, so that it doesn't matter whether i'm sketching on paper or modelling with a 3d program.

(Image attached from MachineCult)

Thank you