New to anime world

well aot is by definition for kids, since it's a shounen aka meant for boys aged 12-18
but yeah, as some anime that are similar to attack on titan, but are even decent, i can list:

• fullmetal alchemist
  
• fullmetal alchemist brotherhood
  
• the original berserk
  
• parasyte
  
• god eater
  
• also my beloved kemonozume
  
• maaybe the first 60ish episodes of bleach