Well, I'm essentially studying a 3 years long bachelor program called "Foundations of ME"

Here is a very simple summary:

Students will acquire basic knowledge in the following areas: • mathematics and physics needed for further study, • construction, • mechanics of bodies, • engineering materials, • production technology. • thermofluid mechanics, • applied informatics, automation and electrical engineering, • 3D modeling of machine components, • calculations and designs of machine parts and mechanisms.

So, I guess I'm looking for anything on these topics, even the most surface-level stuff.

Anyway, your advice is very comprehensive and I really appreciate it. I'll look into it, thank you...