I am fan of the the comics and would like to dive into another superhero run that has the struggles of character growth and comes with a definite ending unlike any of the majority of the ongoing DC/Marvel century old never ending series.
Would be preferable if our protagonist starts out young, but even an older superhero would do. A focus on battles with realistic power scaling like the one in Invincible where the characters have fixed levels but also grow stronger with more training/experience would be great.
Irredeemable/Incorruptible are about a Superman-like, the Plutonian, becoming “evil” and his (second-worse) arch-nemesis, Max Damage, being so traumatized by it that he becomes good.
The first one is about Plutonian’s former friends trying to discover why did he become evil and how to stop it, the second is about Max Damage discovering how to be a good guy after a lifetime of being the worst person around.
They are short enough to read them in half a week (they are 67 issues put together) and are very good, being way more than simply “now Superman is evil, lol”. As the writer, Mark Waid, has a lot of experience writing actual Superman comics.