As a boy, Frankenstein is interested in the works of alchemists such as Cornelius Agrippa, Paracelsus, and Albertus Magnus, and he longs to discover the fabled elixir of life. At the age of fifteen, he loses interest in both these pursuits and in science as a whole after he sees a tree destroyed by a lightning strike and a scientist explains the theory of electricity to him. It seems to him as if nothing can really be known about the world, and he instead devotes himself to studying mathematics, which he describes as "being built upon secure foundations." However, at the University of Ingolstadt in Bavaria, Frankenstein develops a fondness for chemistry, and within two years, his commitment and scientific ability allow him to make discoveries that earn him admiration at the university. He then becomes curious about the nature of life and his studies lead him to a miraculous discovery that enables him to create life in inanimate matter.

I was never convinced that he actually went to school.

He had neither. He dropped out of school to pursue his own experiments.