How do i best work with AI in paper 2D?

Hello Unreal community, i am fairly new to unreal and blueprint scripting.

I have been looking at the twitch stream and other videos on unreal youtube channel but can´t really wrap my head around how to convert some of the AI examples from the 3D to 2D.

For example how do nav-mesh work in the 2D space?
Is it best practice to use blackboard, behavior tree in 2D or is there better ways to do it?

Is there some good documentation or video-links on how to work with AI in the 2D project?

It´s an awesome engine and i love working with it, i just need some help kicking off the 2D AI stuff =)

Thank you