Set velocity on character movement

I have to add the information that it’s a 2D movement, not needed to trace to have a hit point, just want to move on diagonal XZ-Plane.
What you are explaining looks complicated for a simple thing which is to set the linear velocity.
In unity you simply do :

Using PhysX or Bullet Physics you can override the linear velocity in one line too.
No way to simply override the linear velocity like that using blueprint ?