How to make entity play animation before it starts flying and not move before animation ends (nerdy's geckolib)

Hi. I want to create an may beetle entity but i am stuck on making playing animation on entity starts flight. I am trying to prevent it from moving before animation ends. Tried attempt to stop navigation block, slowness potion effect.

There is link to images of maybe needed information and my procedure.
https://imgur.com/a/N6jggoL

Thanks.