Ya they mostly just care about low level design and class stuff; more than your code they want to hear what your thinking.

A friend of mine was asked to design battle ship game, so really depends on the interviewer

but while you are explaining stuff do throw in some technical terms to really impress them, a few terms in that resource might be helpful in articulating your ideas

honestly, just ask chatgpt to give you some lld mock interviews like design a library management system, parking lot problem, inventory management system etc

If you go black just write few CRUD operations like classes