There are many novels about fighting monsters and leveling up in the apocalypse. The following are the ones I recommend to you: Dawn of Life and Death, Rebirth in the Apocalypse and Fighting Monsters with a Loyal Dog CEO, Doomsday Demon God Game, Zombie Rescue Twilight, I Am a Monster in the Apocalypse, Dawn Redemption in the Apocalypse, I Farming in the Apocalypse, and so on. If you are interested, you can try reading them one by one. I hope you like my recommendation. Muah!๐