Ayn Rand (born Alice Rosenbaum) is a fascinating person and an inspiring advocate of freedom but a very mixed blessing philosophically.

She very properly realized that, since the free market is built upon voluntary exchanges, capitalism requires firm moral limits, ruling out violence, coercion, fraud, etc. That was certainly not a concern of Nietzsche, but it was very much a concern of Adam Smith.

Rand's description of "concept formation" seems more sensible. Qualities are "abstracted" from experience and formulated into concepts. Rand shoots for a "conceptualist" theory of universals.

which avoids an Aristotelian "realism" of substantial essences on the one hand and the subjectivism of "nominalism," where universals are just words, on the other hand.

However, a conceptualist theory cannot be consistently maintained.

I can suggest give you the names hegle, hume, kant. These are the real thing you can enjoy.