This is a complete tutorial of creating an enemy that can look for you, chase you and hit you. I hope this helps
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00:00 - Intro
02:19 - Download animations from Mixamo
03:40 - Import the animations
05:30 - Create blendspace
08:34 - Create Zombie AI BP
12:20 - Create the Anim BP
15:30 - Start coding the AI
27:15 - Create Anim montage
28:00 - Coding the AI
32:49 - Results